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clang-p2996/llvm/test/Transforms/InstCombine/getelementptr.ll
Arthur Eubanks 05392466f0 Reland [IR] Increase max alignment to 4GB 
Currently the max alignment representable is 1GB, see D108661.
Setting the align of an object to 4GB is desirable in some cases to make sure the lower 32 bits are clear which can be used for some optimizations, e.g. https://crbug.com/1016945.

This uses an extra bit in instructions that carry an alignment. We can store 15 bits of "free" information, and with this change some instructions (e.g. AtomicCmpXchgInst) use 14 bits.
We can increase the max alignment representable above 4GB (up to 2^62) since we're only using 33 of the 64 values, but I've just limited it to 4GB for now.

The one place we have to update the bitcode format is for the alloca instruction. It stores its alignment into 5 bits of a 32 bit bitfield. I've added another field which is 8 bits and should be future proof for a while. For backward compatibility, we check if the old field has a value and use that, otherwise use the new field.

Updating clang's max allowed alignment will come in a future patch.

Reviewed By: hans

Differential Revision: https://reviews.llvm.org/D110451
2021-10-06 13:29:23 -07:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "e-p:64:64-p1:16:16-p2:32:32:32-p3:64:64:64"
%intstruct = type { i32 }
%pair = type { i32, i32 }
%struct.B = type { double }
%struct.A = type { %struct.B, i32, i32 }
%struct.C = type { [7 x i8] }
@Global = external global [10 x i8]
@Global_as1 = external addrspace(1) global [10 x i8]
; Test noop elimination
define i32* @test1(i32* %I) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: ret i32* [[I:%.*]]
;
%A = getelementptr i32, i32* %I, i64 0
ret i32* %A
}
define i32 addrspace(1)* @test1_as1(i32 addrspace(1)* %I) {
; CHECK-LABEL: @test1_as1(
; CHECK-NEXT: ret i32 addrspace(1)* [[I:%.*]]
;
%A = getelementptr i32, i32 addrspace(1)* %I, i64 0
ret i32 addrspace(1)* %A
}
; Test noop elimination
define i32* @test2(i32* %I) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: ret i32* [[I:%.*]]
;
%A = getelementptr i32, i32* %I
ret i32* %A
}
; Test that two array indexing geps fold
define i32* @test3(i32* %I) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[B:%.*]] = getelementptr i32, i32* [[I:%.*]], i64 21
; CHECK-NEXT: ret i32* [[B]]
;
%A = getelementptr i32, i32* %I, i64 17
%B = getelementptr i32, i32* %A, i64 4
ret i32* %B
}
; Test that two getelementptr insts fold
define i32* @test4({ i32 }* %I) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[B:%.*]] = getelementptr { i32 }, { i32 }* [[I:%.*]], i64 1, i32 0
; CHECK-NEXT: ret i32* [[B]]
;
%A = getelementptr { i32 }, { i32 }* %I, i64 1
%B = getelementptr { i32 }, { i32 }* %A, i64 0, i32 0
ret i32* %B
}
define void @test5(i8 %B) {
; This should be turned into a constexpr instead of being an instruction
; CHECK-LABEL: @test5(
; CHECK-NEXT: store i8 [[B:%.*]], i8* getelementptr inbounds ([10 x i8], [10 x i8]* @Global, i64 0, i64 4), align 1
; CHECK-NEXT: ret void
;
%A = getelementptr [10 x i8], [10 x i8]* @Global, i64 0, i64 4
store i8 %B, i8* %A
ret void
}
define void @test5_as1(i8 %B) {
; This should be turned into a constexpr instead of being an instruction
; CHECK-LABEL: @test5_as1(
; CHECK-NEXT: store i8 [[B:%.*]], i8 addrspace(1)* getelementptr inbounds ([10 x i8], [10 x i8] addrspace(1)* @Global_as1, i16 0, i16 4), align 1
; CHECK-NEXT: ret void
;
%A = getelementptr [10 x i8], [10 x i8] addrspace(1)* @Global_as1, i16 0, i16 4
store i8 %B, i8 addrspace(1)* %A
ret void
}
%as1_ptr_struct = type { i32 addrspace(1)* }
%as2_ptr_struct = type { i32 addrspace(2)* }
@global_as2 = addrspace(2) global i32 zeroinitializer
@global_as1_as2_ptr = addrspace(1) global %as2_ptr_struct { i32 addrspace(2)* @global_as2 }
; This should be turned into a constexpr instead of being an instruction
define void @test_evaluate_gep_nested_as_ptrs(i32 addrspace(2)* %B) {
; CHECK-LABEL: @test_evaluate_gep_nested_as_ptrs(
; CHECK-NEXT: store i32 addrspace(2)* [[B:%.*]], i32 addrspace(2)* addrspace(1)* getelementptr inbounds ([[AS2_PTR_STRUCT:%.*]], [[AS2_PTR_STRUCT]] addrspace(1)* @global_as1_as2_ptr, i16 0, i32 0), align 8
; CHECK-NEXT: ret void
;
%A = getelementptr %as2_ptr_struct, %as2_ptr_struct addrspace(1)* @global_as1_as2_ptr, i16 0, i32 0
store i32 addrspace(2)* %B, i32 addrspace(2)* addrspace(1)* %A
ret void
}
@arst = addrspace(1) global [4 x i8 addrspace(2)*] zeroinitializer
define void @test_evaluate_gep_as_ptrs_array(i8 addrspace(2)* %B) {
; CHECK-LABEL: @test_evaluate_gep_as_ptrs_array(
; CHECK-NEXT: store i8 addrspace(2)* [[B:%.*]], i8 addrspace(2)* addrspace(1)* getelementptr inbounds ([4 x i8 addrspace(2)*], [4 x i8 addrspace(2)*] addrspace(1)* @arst, i16 0, i16 2), align 4
; CHECK-NEXT: ret void
;
%A = getelementptr [4 x i8 addrspace(2)*], [4 x i8 addrspace(2)*] addrspace(1)* @arst, i16 0, i16 2
store i8 addrspace(2)* %B, i8 addrspace(2)* addrspace(1)* %A
ret void
}
define i32* @test7(i32* %I, i64 %C, i64 %D) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: [[A:%.*]] = getelementptr i32, i32* [[I:%.*]], i64 [[C:%.*]]
; CHECK-NEXT: [[B:%.*]] = getelementptr i32, i32* [[A]], i64 [[D:%.*]]
; CHECK-NEXT: ret i32* [[B]]
;
%A = getelementptr i32, i32* %I, i64 %C
%B = getelementptr i32, i32* %A, i64 %D
ret i32* %B
}
define i8* @test8([10 x i32]* %X) {
;; Fold into the cast.
; CHECK-LABEL: @test8(
; CHECK-NEXT: [[B:%.*]] = bitcast [10 x i32]* [[X:%.*]] to i8*
; CHECK-NEXT: ret i8* [[B]]
;
%A = getelementptr [10 x i32], [10 x i32]* %X, i64 0, i64 0
%B = bitcast i32* %A to i8*
ret i8* %B
}
define i32 @test9() {
; CHECK-LABEL: @test9(
; CHECK-NEXT: ret i32 8
;
%A = getelementptr { i32, double }, { i32, double }* null, i32 0, i32 1
%B = ptrtoint double* %A to i32
ret i32 %B
}
define i1 @test10({ i32, i32 }* %x, { i32, i32 }* %y) {
; CHECK-LABEL: @test10(
; CHECK-NEXT: [[TMP_4:%.*]] = icmp eq { i32, i32 }* [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret i1 [[TMP_4]]
;
%tmp.1 = getelementptr { i32, i32 }, { i32, i32 }* %x, i32 0, i32 1
%tmp.3 = getelementptr { i32, i32 }, { i32, i32 }* %y, i32 0, i32 1
;; seteq x, y
%tmp.4 = icmp eq i32* %tmp.1, %tmp.3
ret i1 %tmp.4
}
define i1 @test11({ i32, i32 }* %X) {
; CHECK-LABEL: @test11(
; CHECK-NEXT: [[Q:%.*]] = icmp eq { i32, i32 }* [[X:%.*]], null
; CHECK-NEXT: ret i1 [[Q]]
;
%P = getelementptr { i32, i32 }, { i32, i32 }* %X, i32 0, i32 0
%Q = icmp eq i32* %P, null
ret i1 %Q
}
; PR4748
define i32 @test12(%struct.A* %a) {
; CHECK-LABEL: @test12(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[G3:%.*]] = getelementptr [[STRUCT_A:%.*]], %struct.A* [[A:%.*]], i64 0, i32 1
; CHECK-NEXT: store i32 10, i32* [[G3]], align 4
; CHECK-NEXT: ret i32 10
;
entry:
%g3 = getelementptr %struct.A, %struct.A* %a, i32 0, i32 1
store i32 10, i32* %g3, align 4
%g4 = getelementptr %struct.A, %struct.A* %a, i32 0, i32 0
%new_a = bitcast %struct.B* %g4 to %struct.A*
%g5 = getelementptr %struct.A, %struct.A* %new_a, i32 0, i32 1
%a_a = load i32, i32* %g5, align 4
ret i32 %a_a
}
; PR2235
%S = type { i32, [ 100 x i32] }
define i1 @test13(i64 %X, %S* %P) {
; CHECK-LABEL: @test13(
; CHECK-NEXT: [[C:%.*]] = icmp eq i64 [[X:%.*]], -1
; CHECK-NEXT: ret i1 [[C]]
;
%A = getelementptr inbounds %S, %S* %P, i32 0, i32 1, i64 %X
%B = getelementptr inbounds %S, %S* %P, i32 0, i32 0
%C = icmp eq i32* %A, %B
ret i1 %C
}
define <2 x i1> @test13_vector(<2 x i64> %X, <2 x %S*> %P) nounwind {
; CHECK-LABEL: @test13_vector(
; CHECK-NEXT: [[C:%.*]] = icmp eq <2 x i64> [[X:%.*]], <i64 -1, i64 -1>
; CHECK-NEXT: ret <2 x i1> [[C]]
;
%A = getelementptr inbounds %S, <2 x %S*> %P, <2 x i64> zeroinitializer, <2 x i32> <i32 1, i32 1>, <2 x i64> %X
%B = getelementptr inbounds %S, <2 x %S*> %P, <2 x i64> <i64 0, i64 0>, <2 x i32> <i32 0, i32 0>
%C = icmp eq <2 x i32*> %A, %B
ret <2 x i1> %C
}
define <2 x i1> @test13_vector2(i64 %X, <2 x %S*> %P) nounwind {
; CHECK-LABEL: @test13_vector2(
; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[X:%.*]], i32 0
; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i64> [[DOTSPLATINSERT]], <i64 2, i64 0>
; CHECK-NEXT: [[TMP2:%.*]] = icmp eq <2 x i64> [[TMP1]], <i64 -4, i64 poison>
; CHECK-NEXT: [[C:%.*]] = shufflevector <2 x i1> [[TMP2]], <2 x i1> poison, <2 x i32> zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[C]]
;
%A = getelementptr inbounds %S, <2 x %S*> %P, <2 x i64> zeroinitializer, <2 x i32> <i32 1, i32 1>, i64 %X
%B = getelementptr inbounds %S, <2 x %S*> %P, <2 x i64> <i64 0, i64 0>, <2 x i32> <i32 0, i32 0>
%C = icmp eq <2 x i32*> %A, %B
ret <2 x i1> %C
}
; This is a test of icmp + shl nuw in disguise - 4611... is 0x3fff...
define <2 x i1> @test13_vector3(i64 %X, <2 x %S*> %P) nounwind {
; CHECK-LABEL: @test13_vector3(
; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[X:%.*]], i32 0
; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i64> [[DOTSPLATINSERT]], <i64 2, i64 0>
; CHECK-NEXT: [[TMP2:%.*]] = icmp eq <2 x i64> [[TMP1]], <i64 4, i64 poison>
; CHECK-NEXT: [[C:%.*]] = shufflevector <2 x i1> [[TMP2]], <2 x i1> poison, <2 x i32> zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[C]]
;
%A = getelementptr inbounds %S, <2 x %S*> %P, <2 x i64> zeroinitializer, <2 x i32> <i32 1, i32 1>, i64 %X
%B = getelementptr inbounds %S, <2 x %S*> %P, <2 x i64> <i64 0, i64 0>, <2 x i32> <i32 1, i32 1>, i64 1
%C = icmp eq <2 x i32*> %A, %B
ret <2 x i1> %C
}
define i1 @test13_as1(i16 %X, %S addrspace(1)* %P) {
; CHECK-LABEL: @test13_as1(
; CHECK-NEXT: [[C:%.*]] = icmp eq i16 [[X:%.*]], -1
; CHECK-NEXT: ret i1 [[C]]
;
%A = getelementptr inbounds %S, %S addrspace(1)* %P, i16 0, i32 1, i16 %X
%B = getelementptr inbounds %S, %S addrspace(1)* %P, i16 0, i32 0
%C = icmp eq i32 addrspace(1)* %A, %B
ret i1 %C
}
define <2 x i1> @test13_vector_as1(<2 x i16> %X, <2 x %S addrspace(1)*> %P) {
; CHECK-LABEL: @test13_vector_as1(
; CHECK-NEXT: [[C:%.*]] = icmp eq <2 x i16> [[X:%.*]], <i16 -1, i16 -1>
; CHECK-NEXT: ret <2 x i1> [[C]]
;
%A = getelementptr inbounds %S, <2 x %S addrspace(1)*> %P, <2 x i16> <i16 0, i16 0>, <2 x i32> <i32 1, i32 1>, <2 x i16> %X
%B = getelementptr inbounds %S, <2 x %S addrspace(1)*> %P, <2 x i16> <i16 0, i16 0>, <2 x i32> <i32 0, i32 0>
%C = icmp eq <2 x i32 addrspace(1)*> %A, %B
ret <2 x i1> %C
}
define i1 @test13_i32(i32 %X, %S* %P) {
; CHECK-LABEL: @test13_i32(
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[X:%.*]], -1
; CHECK-NEXT: ret i1 [[C]]
;
%A = getelementptr inbounds %S, %S* %P, i32 0, i32 1, i32 %X
%B = getelementptr inbounds %S, %S* %P, i32 0, i32 0
%C = icmp eq i32* %A, %B
ret i1 %C
}
define i1 @test13_i16(i16 %X, %S* %P) {
; CHECK-LABEL: @test13_i16(
; CHECK-NEXT: [[C:%.*]] = icmp eq i16 [[X:%.*]], -1
; CHECK-NEXT: ret i1 [[C]]
;
%A = getelementptr inbounds %S, %S* %P, i16 0, i32 1, i16 %X
%B = getelementptr inbounds %S, %S* %P, i16 0, i32 0
%C = icmp eq i32* %A, %B
ret i1 %C
}
define i1 @test13_i128(i128 %X, %S* %P) {
; CHECK-LABEL: @test13_i128(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i128 [[X:%.*]] to i64
; CHECK-NEXT: [[C:%.*]] = icmp eq i64 [[TMP1]], -1
; CHECK-NEXT: ret i1 [[C]]
;
%A = getelementptr inbounds %S, %S* %P, i128 0, i32 1, i128 %X
%B = getelementptr inbounds %S, %S* %P, i128 0, i32 0
%C = icmp eq i32* %A, %B
ret i1 %C
}
@G = external global [3 x i8]
define i8* @test14(i32 %idx) {
; CHECK-LABEL: @test14(
; CHECK-NEXT: [[ZEXT:%.*]] = zext i32 [[IDX:%.*]] to i64
; CHECK-NEXT: [[TMP:%.*]] = getelementptr [3 x i8], [3 x i8]* @G, i64 0, i64 [[ZEXT]]
; CHECK-NEXT: ret i8* [[TMP]]
;
%zext = zext i32 %idx to i64
%tmp = getelementptr i8, i8* getelementptr ([3 x i8], [3 x i8]* @G, i32 0, i32 0), i64 %zext
ret i8* %tmp
}
; Test folding of constantexpr geps into normal geps.
@Array = external global [40 x i32]
define i32 *@test15(i64 %X) {
; CHECK-LABEL: @test15(
; CHECK-NEXT: [[A:%.*]] = getelementptr [40 x i32], [40 x i32]* @Array, i64 0, i64 [[X:%.*]]
; CHECK-NEXT: ret i32* [[A]]
;
%A = getelementptr i32, i32* getelementptr ([40 x i32], [40 x i32]* @Array, i64 0, i64 0), i64 %X
ret i32* %A
}
define i32* @test16(i32* %X, i32 %Idx) {
; CHECK-LABEL: @test16(
; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[IDX:%.*]] to i64
; CHECK-NEXT: [[R:%.*]] = getelementptr i32, i32* [[X:%.*]], i64 [[TMP1]]
; CHECK-NEXT: ret i32* [[R]]
;
%R = getelementptr i32, i32* %X, i32 %Idx
ret i32* %R
}
define i1 @test17(i16* %P, i32 %I, i32 %J) {
; CHECK-LABEL: @test17(
; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[I:%.*]], [[J:%.*]]
; CHECK-NEXT: ret i1 [[C]]
;
%X = getelementptr inbounds i16, i16* %P, i32 %I
%Y = getelementptr inbounds i16, i16* %P, i32 %J
%C = icmp ult i16* %X, %Y
ret i1 %C
}
define i1 @test18(i16* %P, i32 %I) {
; CHECK-LABEL: @test18(
; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[I:%.*]], 0
; CHECK-NEXT: ret i1 [[C]]
;
%X = getelementptr inbounds i16, i16* %P, i32 %I
%C = icmp ult i16* %X, %P
ret i1 %C
}
; Larger than the pointer size for a non-zero address space
define i1 @test18_as1(i16 addrspace(1)* %P, i32 %I) {
; CHECK-LABEL: @test18_as1(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[I:%.*]] to i16
; CHECK-NEXT: [[C:%.*]] = icmp slt i16 [[TMP1]], 0
; CHECK-NEXT: ret i1 [[C]]
;
%X = getelementptr inbounds i16, i16 addrspace(1)* %P, i32 %I
%C = icmp ult i16 addrspace(1)* %X, %P
ret i1 %C
}
; Smaller than the pointer size for a non-zero address space
define i1 @test18_as1_i32(i16 addrspace(1)* %P, i32 %I) {
; CHECK-LABEL: @test18_as1_i32(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[I:%.*]] to i16
; CHECK-NEXT: [[C:%.*]] = icmp slt i16 [[TMP1]], 0
; CHECK-NEXT: ret i1 [[C]]
;
%X = getelementptr inbounds i16, i16 addrspace(1)* %P, i32 %I
%C = icmp ult i16 addrspace(1)* %X, %P
ret i1 %C
}
; Smaller than pointer size
define i1 @test18_i16(i16* %P, i16 %I) {
; CHECK-LABEL: @test18_i16(
; CHECK-NEXT: [[C:%.*]] = icmp slt i16 [[I:%.*]], 0
; CHECK-NEXT: ret i1 [[C]]
;
%X = getelementptr inbounds i16, i16* %P, i16 %I
%C = icmp ult i16* %X, %P
ret i1 %C
}
; Same as pointer size
define i1 @test18_i64(i16* %P, i64 %I) {
; CHECK-LABEL: @test18_i64(
; CHECK-NEXT: [[C:%.*]] = icmp slt i64 [[I:%.*]], 0
; CHECK-NEXT: ret i1 [[C]]
;
%X = getelementptr inbounds i16, i16* %P, i64 %I
%C = icmp ult i16* %X, %P
ret i1 %C
}
; Larger than the pointer size
define i1 @test18_i128(i16* %P, i128 %I) {
; CHECK-LABEL: @test18_i128(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i128 [[I:%.*]] to i64
; CHECK-NEXT: [[C:%.*]] = icmp slt i64 [[TMP1]], 0
; CHECK-NEXT: ret i1 [[C]]
;
%X = getelementptr inbounds i16, i16* %P, i128 %I
%C = icmp ult i16* %X, %P
ret i1 %C
}
define i32 @test19(i32* %P, i32 %A, i32 %B) {
; CHECK-LABEL: @test19(
; CHECK-NEXT: [[TMP_10:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP_11:%.*]] = zext i1 [[TMP_10]] to i32
; CHECK-NEXT: ret i32 [[TMP_11]]
;
%tmp.4 = getelementptr inbounds i32, i32* %P, i32 %A
%tmp.9 = getelementptr inbounds i32, i32* %P, i32 %B
%tmp.10 = icmp eq i32* %tmp.4, %tmp.9
%tmp.11 = zext i1 %tmp.10 to i32
ret i32 %tmp.11
}
define i32 @test20(i32* %P, i32 %A, i32 %B) {
; CHECK-LABEL: @test20(
; CHECK-NEXT: [[TMP_6:%.*]] = icmp eq i32 [[A:%.*]], 0
; CHECK-NEXT: [[TMP_7:%.*]] = zext i1 [[TMP_6]] to i32
; CHECK-NEXT: ret i32 [[TMP_7]]
;
%tmp.4 = getelementptr inbounds i32, i32* %P, i32 %A
%tmp.6 = icmp eq i32* %tmp.4, %P
%tmp.7 = zext i1 %tmp.6 to i32
ret i32 %tmp.7
}
define i32 @test20_as1(i32 addrspace(1)* %P, i32 %A, i32 %B) {
; CHECK-LABEL: @test20_as1(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[A:%.*]] to i16
; CHECK-NEXT: [[TMP_6:%.*]] = icmp eq i16 [[TMP1]], 0
; CHECK-NEXT: [[TMP_7:%.*]] = zext i1 [[TMP_6]] to i32
; CHECK-NEXT: ret i32 [[TMP_7]]
;
%tmp.4 = getelementptr inbounds i32, i32 addrspace(1)* %P, i32 %A
%tmp.6 = icmp eq i32 addrspace(1)* %tmp.4, %P
%tmp.7 = zext i1 %tmp.6 to i32
ret i32 %tmp.7
}
define i32 @test21() {
; CHECK-LABEL: @test21(
; CHECK-NEXT: [[PBOB1:%.*]] = alloca [[INTSTRUCT:%.*]], align 8
; CHECK-NEXT: [[PBOBEL:%.*]] = getelementptr inbounds [[INTSTRUCT]], %intstruct* [[PBOB1]], i64 0, i32 0
; CHECK-NEXT: [[RVAL:%.*]] = load i32, i32* [[PBOBEL]], align 8
; CHECK-NEXT: ret i32 [[RVAL]]
;
%pbob1 = alloca %intstruct
%pbob2 = getelementptr %intstruct, %intstruct* %pbob1
%pbobel = getelementptr %intstruct, %intstruct* %pbob2, i64 0, i32 0
%rval = load i32, i32* %pbobel
ret i32 %rval
}
@A = global i32 1 ; <i32*> [#uses=1]
@B = global i32 2 ; <i32*> [#uses=1]
define i1 @test22() {
; CHECK-LABEL: @test22(
; CHECK-NEXT: ret i1 icmp ult (i32* getelementptr inbounds (i32, i32* @A, i64 1), i32* getelementptr (i32, i32* @B, i64 2))
;
%C = icmp ult i32* getelementptr (i32, i32* @A, i64 1),
getelementptr (i32, i32* @B, i64 2)
ret i1 %C
}
%X = type { [10 x i32], float }
define i1 @test23() {
; CHECK-LABEL: @test23(
; CHECK-NEXT: ret i1 false
;
%A = getelementptr %X, %X* null, i64 0, i32 0, i64 0 ; <i32*> [#uses=1]
%B = icmp ne i32* %A, null ; <i1> [#uses=1]
ret i1 %B
}
define void @test25() {
; CHECK-LABEL: @test25(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i64 poison, i64* null, align 4294967296
; CHECK-NEXT: tail call void @foo25(i32 0, i64 poison)
; CHECK-NEXT: unreachable
;
entry:
%tmp = getelementptr { i64, i64, i64, i64 }, { i64, i64, i64, i64 }* null, i32 0, i32 3 ; <i64*> [#uses=1]
%tmp.upgrd.1 = load i64, i64* %tmp ; <i64> [#uses=1]
%tmp8.ui = load i64, i64* null ; <i64> [#uses=1]
%tmp8 = bitcast i64 %tmp8.ui to i64 ; <i64> [#uses=1]
%tmp9 = and i64 %tmp8, %tmp.upgrd.1 ; <i64> [#uses=1]
%sext = trunc i64 %tmp9 to i32 ; <i32> [#uses=1]
%tmp27.i = sext i32 %sext to i64 ; <i64> [#uses=1]
tail call void @foo25( i32 0, i64 %tmp27.i )
unreachable
}
declare void @foo25(i32, i64)
; PR1637
define i1 @test26(i8* %arr) {
; CHECK-LABEL: @test26(
; CHECK-NEXT: ret i1 true
;
%X = getelementptr i8, i8* %arr, i32 1
%Y = getelementptr i8, i8* %arr, i32 1
%test = icmp uge i8* %X, %Y
ret i1 %test
}
%struct.__large_struct = type { [100 x i64] }
%struct.compat_siginfo = type { i32, i32, i32, { [29 x i32] } }
%struct.siginfo_t = type { i32, i32, i32, { { i32, i32, [0 x i8], %struct.sigval_t, i32 }, [88 x i8] } }
%struct.sigval_t = type { i8* }
define i32 @test27(%struct.compat_siginfo* %to, %struct.siginfo_t* %from) {
; CHECK-LABEL: @test27(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[FROM_ADDR:%.*]] = alloca %struct.siginfo_t*, align 8
; CHECK-NEXT: [[TMP344:%.*]] = load %struct.siginfo_t*, %struct.siginfo_t** [[FROM_ADDR]], align 8
; CHECK-NEXT: [[TMP349:%.*]] = getelementptr [[STRUCT_SIGINFO_T:%.*]], %struct.siginfo_t* [[TMP344]], i64 0, i32 3, i32 0, i32 3, i32 0
; CHECK-NEXT: [[TMP349350:%.*]] = bitcast i8** [[TMP349]] to i32*
; CHECK-NEXT: [[TMP351:%.*]] = load i32, i32* [[TMP349350]], align 8
; CHECK-NEXT: [[TMP360:%.*]] = call i32 asm sideeffect "...", "=r,ir,*m,i,0,~{dirflag},~{fpsr},~{flags}"(i32 [[TMP351]], %struct.__large_struct* null, i32 -14, i32 0) #[[ATTR0:[0-9]+]]
; CHECK-NEXT: unreachable
;
entry:
%from_addr = alloca %struct.siginfo_t*
%tmp344 = load %struct.siginfo_t*, %struct.siginfo_t** %from_addr, align 8
%tmp345 = getelementptr %struct.siginfo_t, %struct.siginfo_t* %tmp344, i32 0, i32 3
%tmp346 = getelementptr { { i32, i32, [0 x i8], %struct.sigval_t, i32 }, [88 x i8] }, { { i32, i32, [0 x i8], %struct.sigval_t, i32 }, [88 x i8] }* %tmp345, i32 0, i32 0
%tmp346347 = bitcast { i32, i32, [0 x i8], %struct.sigval_t, i32 }* %tmp346 to { i32, i32, %struct.sigval_t }*
%tmp348 = getelementptr { i32, i32, %struct.sigval_t }, { i32, i32, %struct.sigval_t }* %tmp346347, i32 0, i32 2
%tmp349 = getelementptr %struct.sigval_t, %struct.sigval_t* %tmp348, i32 0, i32 0
%tmp349350 = bitcast i8** %tmp349 to i32*
%tmp351 = load i32, i32* %tmp349350, align 8
%tmp360 = call i32 asm sideeffect "...",
"=r,ir,*m,i,0,~{dirflag},~{fpsr},~{flags}"( i32 %tmp351,
%struct.__large_struct* null, i32 -14, i32 0 )
unreachable
}
; PR1978
%struct.x = type <{ i8 }>
@.str = internal constant [6 x i8] c"Main!\00"
@.str1 = internal constant [12 x i8] c"destroy %p\0A\00"
define i32 @test28() nounwind {
; CHECK-LABEL: @test28(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ORIENTATIONS:%.*]] = alloca [1 x [1 x %struct.x]], align 8
; CHECK-NEXT: [[TMP3:%.*]] = call i32 @puts(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0)) #[[ATTR0]]
; CHECK-NEXT: br label [[BB10:%.*]]
; CHECK: bb10:
; CHECK-NEXT: [[INDVAR:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INDVAR_NEXT:%.*]], [[BB10]] ]
; CHECK-NEXT: [[TMP12_REC:%.*]] = xor i32 [[INDVAR]], -1
; CHECK-NEXT: [[TMP0:%.*]] = sext i32 [[TMP12_REC]] to i64
; CHECK-NEXT: [[TMP12:%.*]] = getelementptr inbounds [1 x [1 x %struct.x]], [1 x [1 x %struct.x]]* [[ORIENTATIONS]], i64 1, i64 0, i64 [[TMP0]]
; CHECK-NEXT: [[TMP16:%.*]] = call i32 (i8*, ...) @printf(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str1, i64 0, i64 0), %struct.x* nonnull [[TMP12]]) #[[ATTR0]]
; CHECK-NEXT: [[TMP84:%.*]] = icmp eq i32 [[INDVAR]], 0
; CHECK-NEXT: [[INDVAR_NEXT]] = add i32 [[INDVAR]], 1
; CHECK-NEXT: br i1 [[TMP84]], label [[BB17:%.*]], label [[BB10]]
; CHECK: bb17:
; CHECK-NEXT: ret i32 0
;
entry:
%orientations = alloca [1 x [1 x %struct.x]]
%tmp3 = call i32 @puts( i8* getelementptr ([6 x i8], [6 x i8]* @.str, i32 0, i32 0) ) nounwind
%tmp45 = getelementptr inbounds [1 x [1 x %struct.x]], [1 x [1 x %struct.x]]* %orientations, i32 1, i32 0, i32 0
%orientations62 = getelementptr [1 x [1 x %struct.x]], [1 x [1 x %struct.x]]* %orientations, i32 0, i32 0, i32 0
br label %bb10
bb10:
%indvar = phi i32 [ 0, %entry ], [ %indvar.next, %bb10 ]
%tmp.0.reg2mem.0.rec = mul i32 %indvar, -1
%tmp12.rec = add i32 %tmp.0.reg2mem.0.rec, -1
%tmp12 = getelementptr inbounds %struct.x, %struct.x* %tmp45, i32 %tmp12.rec
%tmp16 = call i32 (i8*, ...) @printf( i8* nonnull dereferenceable(1) getelementptr ([12 x i8], [12 x i8]* @.str1, i32 0, i32 0), %struct.x* %tmp12 ) nounwind
%tmp84 = icmp eq %struct.x* %tmp12, %orientations62
%indvar.next = add i32 %indvar, 1
br i1 %tmp84, label %bb17, label %bb10
bb17:
ret i32 0
}
declare i32 @puts(i8*)
declare i32 @printf(i8*, ...)
; rdar://6762290
%T = type <{ i64, i64, i64 }>
define i32 @test29(i8* %start, i32 %X) nounwind {
; CHECK-LABEL: @test29(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i64 poison, i64* null, align 4294967296
; CHECK-NEXT: br i1 poison, label [[IF_THEN216:%.*]], label [[IF_END363:%.*]]
; CHECK: if.then216:
; CHECK-NEXT: ret i32 1
; CHECK: if.end363:
; CHECK-NEXT: ret i32 0
;
entry:
%tmp3 = load i64, i64* null
%add.ptr = getelementptr i8, i8* %start, i64 %tmp3
%tmp158 = load i32, i32* null
%add.ptr159 = getelementptr %T, %T* null, i32 %tmp158
%add.ptr209 = getelementptr i8, i8* %start, i64 0
%add.ptr212 = getelementptr i8, i8* %add.ptr209, i32 %X
%cmp214 = icmp ugt i8* %add.ptr212, %add.ptr
br i1 %cmp214, label %if.then216, label %if.end363
if.then216:
ret i32 1
if.end363:
ret i32 0
}
; PR3694
define i32 @test30(i32 %m, i32 %n) nounwind {
; CHECK-LABEL: @test30(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT: [[TMP1:%.*]] = alloca i32, i64 [[TMP0]], align 4
; CHECK-NEXT: call void @test30f(i32* nonnull [[TMP1]]) #[[ATTR0]]
; CHECK-NEXT: [[TMP2:%.*]] = sext i32 [[M:%.*]] to i64
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr i32, i32* [[TMP1]], i64 [[TMP2]]
; CHECK-NEXT: [[TMP4:%.*]] = load i32, i32* [[TMP3]], align 4
; CHECK-NEXT: ret i32 [[TMP4]]
;
entry:
%0 = alloca i32, i32 %n, align 4
%1 = bitcast i32* %0 to [0 x i32]*
call void @test30f(i32* %0) nounwind
%2 = getelementptr [0 x i32], [0 x i32]* %1, i32 0, i32 %m
%3 = load i32, i32* %2, align 4
ret i32 %3
}
declare void @test30f(i32*)
define i1 @test31(i32* %A) {
; CHECK-LABEL: @test31(
; CHECK-NEXT: ret i1 true
;
%B = getelementptr i32, i32* %A, i32 1
%C = getelementptr i32, i32* %A, i64 1
%V = icmp eq i32* %B, %C
ret i1 %V
}
; PR1345
define i8* @test32(i8* %v) {
; CHECK-LABEL: @test32(
; CHECK-NEXT: [[A:%.*]] = alloca [4 x i8*], align 16
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds [4 x i8*], [4 x i8*]* [[A]], i64 0, i64 0
; CHECK-NEXT: store i8* null, i8** [[B]], align 16
; CHECK-NEXT: [[D:%.*]] = getelementptr inbounds [4 x i8*], [4 x i8*]* [[A]], i64 0, i64 1
; CHECK-NEXT: store i8* [[V:%.*]], i8** [[D]], align 8
; CHECK-NEXT: [[F:%.*]] = getelementptr inbounds [4 x i8*], [4 x i8*]* [[A]], i64 0, i64 2
; CHECK-NEXT: [[G:%.*]] = load i8*, i8** [[F]], align 16
; CHECK-NEXT: ret i8* [[G]]
;
%A = alloca [4 x i8*], align 16
%B = getelementptr [4 x i8*], [4 x i8*]* %A, i32 0, i32 0
store i8* null, i8** %B
%C = bitcast [4 x i8*]* %A to { [16 x i8] }*
%D = getelementptr { [16 x i8] }, { [16 x i8] }* %C, i32 0, i32 0, i32 8
%E = bitcast i8* %D to i8**
store i8* %v, i8** %E
%F = getelementptr [4 x i8*], [4 x i8*]* %A, i32 0, i32 2
%G = load i8*, i8** %F
ret i8* %G
}
; PR3290
%struct.Key = type { { i32, i32 } }
%struct.anon = type <{ i8, [3 x i8], i32 }>
define i32* @test33(%struct.Key* %A) {
; CHECK-LABEL: @test33(
; CHECK-NEXT: [[TMP1:%.*]] = getelementptr [[STRUCT_KEY:%.*]], %struct.Key* [[A:%.*]], i64 0, i32 0, i32 1
; CHECK-NEXT: ret i32* [[TMP1]]
;
%B = bitcast %struct.Key* %A to %struct.anon*
%C = getelementptr %struct.anon, %struct.anon* %B, i32 0, i32 2
ret i32* %C
}
define i32 addrspace(1)* @test33_as1(%struct.Key addrspace(1)* %A) {
; CHECK-LABEL: @test33_as1(
; CHECK-NEXT: [[TMP1:%.*]] = getelementptr [[STRUCT_KEY:%.*]], [[STRUCT_KEY]] addrspace(1)* [[A:%.*]], i16 0, i32 0, i32 1
; CHECK-NEXT: ret i32 addrspace(1)* [[TMP1]]
;
%B = bitcast %struct.Key addrspace(1)* %A to %struct.anon addrspace(1)*
%C = getelementptr %struct.anon, %struct.anon addrspace(1)* %B, i32 0, i32 2
ret i32 addrspace(1)* %C
}
define i32 addrspace(1)* @test33_array_as1([10 x i32] addrspace(1)* %A) {
; CHECK-LABEL: @test33_array_as1(
; CHECK-NEXT: [[C:%.*]] = getelementptr [10 x i32], [10 x i32] addrspace(1)* [[A:%.*]], i16 0, i16 2
; CHECK-NEXT: ret i32 addrspace(1)* [[C]]
;
%B = bitcast [10 x i32] addrspace(1)* %A to [5 x i32] addrspace(1)*
%C = getelementptr [5 x i32], [5 x i32] addrspace(1)* %B, i32 0, i32 2
ret i32 addrspace(1)* %C
}
; Make sure the GEP indices use the right pointer sized integer
define i32 addrspace(1)* @test33_array_struct_as1([10 x %struct.Key] addrspace(1)* %A) {
; CHECK-LABEL: @test33_array_struct_as1(
; CHECK-NEXT: [[TMP1:%.*]] = getelementptr [10 x %struct.Key], [10 x %struct.Key] addrspace(1)* [[A:%.*]], i16 0, i16 1, i32 0, i32 0
; CHECK-NEXT: ret i32 addrspace(1)* [[TMP1]]
;
%B = bitcast [10 x %struct.Key] addrspace(1)* %A to [20 x i32] addrspace(1)*
%C = getelementptr [20 x i32], [20 x i32] addrspace(1)* %B, i32 0, i32 2
ret i32 addrspace(1)* %C
}
define i32 addrspace(1)* @test33_addrspacecast(%struct.Key* %A) {
; CHECK-LABEL: @test33_addrspacecast(
; CHECK-NEXT: [[C:%.*]] = getelementptr [[STRUCT_KEY:%.*]], %struct.Key* [[A:%.*]], i64 0, i32 0, i32 1
; CHECK-NEXT: [[TMP1:%.*]] = addrspacecast i32* [[C]] to i32 addrspace(1)*
; CHECK-NEXT: ret i32 addrspace(1)* [[TMP1]]
;
%B = addrspacecast %struct.Key* %A to %struct.anon addrspace(1)*
%C = getelementptr %struct.anon, %struct.anon addrspace(1)* %B, i32 0, i32 2
ret i32 addrspace(1)* %C
}
%T2 = type { i8*, i8 }
define i8* @test34(i8* %Val, i64 %V) nounwind {
; CHECK-LABEL: @test34(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[C_CAST:%.*]] = inttoptr i64 [[V:%.*]] to i8*
; CHECK-NEXT: ret i8* [[C_CAST]]
;
entry:
%A = alloca %T2, align 8
%mrv_gep = bitcast %T2* %A to i64*
%B = getelementptr %T2, %T2* %A, i64 0, i32 0
store i64 %V, i64* %mrv_gep
%C = load i8*, i8** %B, align 8
ret i8* %C
}
%t0 = type { i8*, [19 x i8] }
%t1 = type { i8*, [0 x i8] }
@array = external global [11 x i8]
@s = external global %t0
@"\01LC8" = external constant [17 x i8]
; Instcombine should be able to fold this getelementptr.
define i32 @test35() nounwind {
; CHECK-LABEL: @test35(
; CHECK-NEXT: [[TMP1:%.*]] = call i32 (i8*, ...) @printf(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @"\01LC8", i64 0, i64 0), i8* getelementptr inbounds ([[T0:%.*]], %t0* @s, i64 0, i32 1, i64 0)) #[[ATTR0]]
; CHECK-NEXT: ret i32 0
;
call i32 (i8*, ...) @printf(i8* getelementptr ([17 x i8], [17 x i8]* @"\01LC8", i32 0, i32 0),
i8* getelementptr (%t1, %t1* bitcast (%t0* @s to %t1*), i32 0, i32 1, i32 0)) nounwind
ret i32 0
}
; Don't treat signed offsets as unsigned.
define i8* @test36() nounwind {
; CHECK-LABEL: @test36(
; CHECK-NEXT: ret i8* getelementptr ([11 x i8], [11 x i8]* @array, i64 -1, i64 10)
;
ret i8* getelementptr ([11 x i8], [11 x i8]* @array, i32 0, i64 -1)
}
; Instcombine shouldn't assume that gep(A,0,1) != gep(A,1,0).
@A37 = external constant [1 x i8]
define i1 @test37() nounwind {
; CHECK-LABEL: @test37(
; CHECK-NEXT: ret i1 true
;
%t = icmp eq i8* getelementptr ([1 x i8], [1 x i8]* @A37, i64 0, i64 1),
getelementptr ([1 x i8], [1 x i8]* @A37, i64 1, i64 0)
ret i1 %t
}
; Test index promotion
define i32* @test38(i32* %I, i32 %n) {
; CHECK-LABEL: @test38(
; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[N:%.*]] to i64
; CHECK-NEXT: [[A:%.*]] = getelementptr i32, i32* [[I:%.*]], i64 [[TMP1]]
; CHECK-NEXT: ret i32* [[A]]
;
%A = getelementptr i32, i32* %I, i32 %n
ret i32* %A
}
; Test that we don't duplicate work when the second gep is a "bitcast".
%pr10322_t = type { i8* }
declare void @pr10322_f2(%pr10322_t*)
declare void @pr10322_f3(i8**)
define void @pr10322_f1(%pr10322_t* %foo) {
; CHECK-LABEL: @pr10322_f1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ARRAYIDX8:%.*]] = getelementptr inbounds [[PR10322_T:%.*]], %pr10322_t* [[FOO:%.*]], i64 2
; CHECK-NEXT: call void @pr10322_f2(%pr10322_t* nonnull [[ARRAYIDX8]]) #[[ATTR0]]
; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds [[PR10322_T]], %pr10322_t* [[ARRAYIDX8]], i64 0, i32 0
; CHECK-NEXT: call void @pr10322_f3(i8** nonnull [[TMP2]]) #[[ATTR0]]
; CHECK-NEXT: ret void
;
entry:
%arrayidx8 = getelementptr inbounds %pr10322_t, %pr10322_t* %foo, i64 2
call void @pr10322_f2(%pr10322_t* %arrayidx8) nounwind
%tmp2 = getelementptr inbounds %pr10322_t, %pr10322_t* %arrayidx8, i64 0, i32 0
call void @pr10322_f3(i8** %tmp2) nounwind
ret void
}
; Test that we combine the last two geps in this sequence, before we
; would wait for gep1 and gep2 to be combined and never combine 2 and 3.
%three_gep_t = type {i32}
%three_gep_t2 = type {%three_gep_t}
define void @three_gep_f(%three_gep_t2* %x) {
; CHECK-LABEL: @three_gep_f(
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr [[THREE_GEP_T2:%.*]], %three_gep_t2* [[X:%.*]], i64 2
; CHECK-NEXT: call void @three_gep_h(%three_gep_t2* [[GEP1]])
; CHECK-NEXT: [[GEP3:%.*]] = getelementptr [[THREE_GEP_T2]], %three_gep_t2* [[GEP1]], i64 0, i32 0, i32 0
; CHECK-NEXT: call void @three_gep_g(i32* [[GEP3]])
; CHECK-NEXT: ret void
;
%gep1 = getelementptr %three_gep_t2, %three_gep_t2* %x, i64 2
call void @three_gep_h(%three_gep_t2* %gep1)
%gep2 = getelementptr %three_gep_t2, %three_gep_t2* %gep1, i64 0, i32 0
%gep3 = getelementptr %three_gep_t, %three_gep_t* %gep2, i64 0, i32 0
call void @three_gep_g(i32* %gep3)
ret void
}
declare void @three_gep_g(i32*)
declare void @three_gep_h(%three_gep_t2*)
%struct.ham = type { i32, %struct.zot*, %struct.zot*, %struct.zot* }
%struct.zot = type { i64, i8 }
define void @test39(%struct.ham* %arg, i8 %arg1) nounwind {
; CHECK-LABEL: @test39(
; CHECK-NEXT: [[TMP:%.*]] = getelementptr inbounds [[STRUCT_HAM:%.*]], %struct.ham* [[ARG:%.*]], i64 0, i32 2
; CHECK-NEXT: [[TMP1:%.*]] = bitcast %struct.zot** [[TMP]] to i8**
; CHECK-NEXT: [[TMP21:%.*]] = load i8*, i8** [[TMP1]], align 8
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds i8, i8* [[TMP21]], i64 -8
; CHECK-NEXT: store i8 [[ARG1:%.*]], i8* [[TMP4]], align 8
; CHECK-NEXT: ret void
;
%tmp = getelementptr inbounds %struct.ham, %struct.ham* %arg, i64 0, i32 2
%tmp2 = load %struct.zot*, %struct.zot** %tmp, align 8
%tmp3 = bitcast %struct.zot* %tmp2 to i8*
%tmp4 = getelementptr inbounds i8, i8* %tmp3, i64 -8
store i8 %arg1, i8* %tmp4, align 8
ret void
}
define i1 @pr16483([1 x i8]* %a, [1 x i8]* %b) {
; CHECK-LABEL: @pr16483(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult [1 x i8]* [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%c = getelementptr [1 x i8], [1 x i8]* %a, i32 0, i32 0
%d = getelementptr [1 x i8], [1 x i8]* %b, i32 0, i32 0
%cmp = icmp ult i8* %c, %d
ret i1 %cmp
}
define i8 @test_gep_bitcast_as1(i32 addrspace(1)* %arr, i16 %N) {
; CHECK-LABEL: @test_gep_bitcast_as1(
; CHECK-NEXT: [[T1:%.*]] = getelementptr i32, i32 addrspace(1)* [[ARR:%.*]], i16 [[N:%.*]]
; CHECK-NEXT: [[T:%.*]] = bitcast i32 addrspace(1)* [[T1]] to i8 addrspace(1)*
; CHECK-NEXT: [[X:%.*]] = load i8, i8 addrspace(1)* [[T]], align 1
; CHECK-NEXT: ret i8 [[X]]
;
%cast = bitcast i32 addrspace(1)* %arr to i8 addrspace(1)*
%V = mul i16 %N, 4
%t = getelementptr i8, i8 addrspace(1)* %cast, i16 %V
%x = load i8, i8 addrspace(1)* %t
ret i8 %x
}
; The element size of the array matches the element size of the pointer
define i64 @test_gep_bitcast_array_same_size_element([100 x double]* %arr, i64 %N) {
; CHECK-LABEL: @test_gep_bitcast_array_same_size_element(
; CHECK-NEXT: [[V:%.*]] = shl i64 [[N:%.*]], 3
; CHECK-NEXT: [[T1:%.*]] = getelementptr [100 x double], [100 x double]* [[ARR:%.*]], i64 0, i64 [[V]]
; CHECK-NEXT: [[T:%.*]] = bitcast double* [[T1]] to i64*
; CHECK-NEXT: [[X:%.*]] = load i64, i64* [[T]], align 4
; CHECK-NEXT: ret i64 [[X]]
;
%cast = bitcast [100 x double]* %arr to i64*
%V = mul i64 %N, 8
%t = getelementptr i64, i64* %cast, i64 %V
%x = load i64, i64* %t
ret i64 %x
}
; gep should be done in the original address space.
define i64 @test_gep_bitcast_array_same_size_element_addrspacecast([100 x double]* %arr, i64 %N) {
; CHECK-LABEL: @test_gep_bitcast_array_same_size_element_addrspacecast(
; CHECK-NEXT: [[V:%.*]] = shl i64 [[N:%.*]], 3
; CHECK-NEXT: [[T1:%.*]] = getelementptr [100 x double], [100 x double]* [[ARR:%.*]], i64 0, i64 [[V]]
; CHECK-NEXT: [[TMP1:%.*]] = bitcast double* [[T1]] to i64*
; CHECK-NEXT: [[T:%.*]] = addrspacecast i64* [[TMP1]] to i64 addrspace(3)*
; CHECK-NEXT: [[X:%.*]] = load i64, i64 addrspace(3)* [[T]], align 4
; CHECK-NEXT: ret i64 [[X]]
;
%cast = addrspacecast [100 x double]* %arr to i64 addrspace(3)*
%V = mul i64 %N, 8
%t = getelementptr i64, i64 addrspace(3)* %cast, i64 %V
%x = load i64, i64 addrspace(3)* %t
ret i64 %x
}
; The element size of the array is different the element size of the pointer
define i8 @test_gep_bitcast_array_different_size_element([100 x double]* %arr, i64 %N) {
; CHECK-LABEL: @test_gep_bitcast_array_different_size_element(
; CHECK-NEXT: [[T1:%.*]] = getelementptr [100 x double], [100 x double]* [[ARR:%.*]], i64 0, i64 [[N:%.*]]
; CHECK-NEXT: [[T:%.*]] = bitcast double* [[T1]] to i8*
; CHECK-NEXT: [[X:%.*]] = load i8, i8* [[T]], align 1
; CHECK-NEXT: ret i8 [[X]]
;
%cast = bitcast [100 x double]* %arr to i8*
%V = mul i64 %N, 8
%t = getelementptr i8, i8* %cast, i64 %V
%x = load i8, i8* %t
ret i8 %x
}
define i64 @test_gep_bitcast_array_same_size_element_as1([100 x double] addrspace(1)* %arr, i16 %N) {
; CHECK-LABEL: @test_gep_bitcast_array_same_size_element_as1(
; CHECK-NEXT: [[V:%.*]] = shl i16 [[N:%.*]], 3
; CHECK-NEXT: [[T1:%.*]] = getelementptr [100 x double], [100 x double] addrspace(1)* [[ARR:%.*]], i16 0, i16 [[V]]
; CHECK-NEXT: [[T:%.*]] = bitcast double addrspace(1)* [[T1]] to i64 addrspace(1)*
; CHECK-NEXT: [[X:%.*]] = load i64, i64 addrspace(1)* [[T]], align 4
; CHECK-NEXT: ret i64 [[X]]
;
%cast = bitcast [100 x double] addrspace(1)* %arr to i64 addrspace(1)*
%V = mul i16 %N, 8
%t = getelementptr i64, i64 addrspace(1)* %cast, i16 %V
%x = load i64, i64 addrspace(1)* %t
ret i64 %x
}
define i8 @test_gep_bitcast_array_different_size_element_as1([100 x double] addrspace(1)* %arr, i16 %N) {
; CHECK-LABEL: @test_gep_bitcast_array_different_size_element_as1(
; CHECK-NEXT: [[T1:%.*]] = getelementptr [100 x double], [100 x double] addrspace(1)* [[ARR:%.*]], i16 0, i16 [[N:%.*]]
; CHECK-NEXT: [[T:%.*]] = bitcast double addrspace(1)* [[T1]] to i8 addrspace(1)*
; CHECK-NEXT: [[X:%.*]] = load i8, i8 addrspace(1)* [[T]], align 1
; CHECK-NEXT: ret i8 [[X]]
;
%cast = bitcast [100 x double] addrspace(1)* %arr to i8 addrspace(1)*
%V = mul i16 %N, 8
%t = getelementptr i8, i8 addrspace(1)* %cast, i16 %V
%x = load i8, i8 addrspace(1)* %t
ret i8 %x
}
define i64 @test40() {
; CHECK-LABEL: @test40(
; CHECK-NEXT: ret i64 8
;
%array = alloca [3 x i32], align 4
%gep = getelementptr inbounds [3 x i32], [3 x i32]* %array, i64 0, i64 2
%gepi8 = bitcast i32* %gep to i8*
%p = ptrtoint [3 x i32]* %array to i64
%np = sub i64 0, %p
%gep2 = getelementptr i8, i8* %gepi8, i64 %np
%ret = ptrtoint i8* %gep2 to i64
ret i64 %ret
}
define i16 @test41([3 x i32] addrspace(1)* %array) {
; CHECK-LABEL: @test41(
; CHECK-NEXT: ret i16 8
;
%gep = getelementptr inbounds [3 x i32], [3 x i32] addrspace(1)* %array, i16 0, i16 2
%gepi8 = bitcast i32 addrspace(1)* %gep to i8 addrspace(1)*
%p = ptrtoint [3 x i32] addrspace(1)* %array to i16
%np = sub i16 0, %p
%gep2 = getelementptr i8, i8 addrspace(1)* %gepi8, i16 %np
%ret = ptrtoint i8 addrspace(1)* %gep2 to i16
ret i16 %ret
}
define i8* @test42i(i8* %c1, i8* %c2) {
; CHECK-LABEL: @test42i(
; CHECK-NEXT: [[PTRTOINT:%.*]] = ptrtoint i8* [[C1:%.*]] to i64
; CHECK-NEXT: [[SUB:%.*]] = sub i64 0, [[PTRTOINT]]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, i8* [[C2:%.*]], i64 [[SUB]]
; CHECK-NEXT: ret i8* [[GEP]]
;
%ptrtoint = ptrtoint i8* %c1 to i64
%sub = sub i64 0, %ptrtoint
%gep = getelementptr inbounds i8, i8* %c2, i64 %sub
ret i8* %gep
}
define i8* @test42(i8* %c1, i8* %c2) {
; CHECK-LABEL: @test42(
; CHECK-NEXT: [[PTRTOINT:%.*]] = ptrtoint i8* [[C1:%.*]] to i64
; CHECK-NEXT: [[SUB:%.*]] = sub i64 0, [[PTRTOINT]]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, i8* [[C2:%.*]], i64 [[SUB]]
; CHECK-NEXT: ret i8* [[GEP]]
;
%ptrtoint = ptrtoint i8* %c1 to i64
%sub = sub i64 0, %ptrtoint
%gep = getelementptr i8, i8* %c2, i64 %sub
ret i8* %gep
}
define i16* @test43i(i16* %c1, i16* %c2) {
; CHECK-LABEL: @test43i(
; CHECK-NEXT: [[PTRTOINT:%.*]] = ptrtoint i16* [[C1:%.*]] to i64
; CHECK-NEXT: [[SUB:%.*]] = sub i64 0, [[PTRTOINT]]
; CHECK-NEXT: [[SHR:%.*]] = ashr i64 [[SUB]], 1
; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i16, i16* [[C2:%.*]], i64 [[SHR]]
; CHECK-NEXT: ret i16* [[GEP]]
;
%ptrtoint = ptrtoint i16* %c1 to i64
%sub = sub i64 0, %ptrtoint
%shr = ashr i64 %sub, 1
%gep = getelementptr inbounds i16, i16* %c2, i64 %shr
ret i16* %gep
}
define %struct.C* @test44i(%struct.C* %c1, %struct.C* %c2) {
; CHECK-LABEL: @test44i(
; CHECK-NEXT: [[PTRTOINT:%.*]] = ptrtoint %struct.C* [[C1:%.*]] to i64
; CHECK-NEXT: [[SUB:%.*]] = sub i64 0, [[PTRTOINT]]
; CHECK-NEXT: [[SHR:%.*]] = sdiv i64 [[SUB]], 7
; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [[STRUCT_C:%.*]], %struct.C* [[C2:%.*]], i64 [[SHR]]
; CHECK-NEXT: ret %struct.C* [[GEP]]
;
%ptrtoint = ptrtoint %struct.C* %c1 to i64
%sub = sub i64 0, %ptrtoint
%shr = sdiv i64 %sub, 7
%gep = getelementptr inbounds %struct.C, %struct.C* %c2, i64 %shr
ret %struct.C* %gep
}
define %struct.C* @test45(%struct.C* %c1, %struct.C** %c2) {
; CHECK-LABEL: @test45(
; CHECK-NEXT: [[PTRTOINT1:%.*]] = ptrtoint %struct.C* [[C1:%.*]] to i64
; CHECK-NEXT: [[PTRTOINT2:%.*]] = ptrtoint %struct.C** [[C2:%.*]] to i64
; CHECK-NEXT: [[SUB:%.*]] = sub i64 [[PTRTOINT2]], [[PTRTOINT1]]
; CHECK-NEXT: [[SHR:%.*]] = sdiv i64 [[SUB]], 7
; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [[STRUCT_C:%.*]], %struct.C* [[C1]], i64 [[SHR]]
; CHECK-NEXT: ret %struct.C* [[GEP]]
;
%ptrtoint1 = ptrtoint %struct.C* %c1 to i64
%ptrtoint2 = ptrtoint %struct.C** %c2 to i64
%sub = sub i64 %ptrtoint2, %ptrtoint1 ; C2 - C1
%shr = sdiv i64 %sub, 7
%gep = getelementptr inbounds %struct.C, %struct.C* %c1, i64 %shr ; C1 + (C2 - C1)
ret %struct.C* %gep
}
define %struct.C* @test46(%struct.C* %c1, %struct.C* %c2, i64 %N) {
; CHECK-LABEL: @test46(
; CHECK-NEXT: [[PTRTOINT:%.*]] = ptrtoint %struct.C* [[C1:%.*]] to i64
; CHECK-NEXT: [[SUB:%.*]] = sub i64 0, [[PTRTOINT]]
; CHECK-NEXT: [[SDIV:%.*]] = sdiv i64 [[SUB]], [[N:%.*]]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [[STRUCT_C:%.*]], %struct.C* [[C2:%.*]], i64 [[SDIV]]
; CHECK-NEXT: ret %struct.C* [[GEP]]
;
%ptrtoint = ptrtoint %struct.C* %c1 to i64
%sub = sub i64 0, %ptrtoint
%sdiv = sdiv i64 %sub, %N
%gep = getelementptr inbounds %struct.C, %struct.C* %c2, i64 %sdiv
ret %struct.C* %gep
}
define i32* @test47(i32* %I, i64 %C, i64 %D) {
; CHECK-LABEL: @test47(
; CHECK-NEXT: [[B:%.*]] = getelementptr i32, i32* [[I:%.*]], i64 [[D:%.*]]
; CHECK-NEXT: ret i32* [[B]]
;
%sub = sub i64 %D, %C
%A = getelementptr i32, i32* %I, i64 %C
%B = getelementptr i32, i32* %A, i64 %sub
ret i32* %B
}
define i32* @test48(i32* %I, i64 %C, i64 %D) {
; CHECK-LABEL: @test48(
; CHECK-NEXT: [[B:%.*]] = getelementptr i32, i32* [[I:%.*]], i64 [[D:%.*]]
; CHECK-NEXT: ret i32* [[B]]
;
%sub = sub i64 %D, %C
%A = getelementptr i32, i32* %I, i64 %sub
%B = getelementptr i32, i32* %A, i64 %C
ret i32* %B
}
define i32* @test49(i32* %I, i64 %C) {
; CHECK-LABEL: @test49(
; CHECK-NEXT: [[B:%.*]] = getelementptr i32, i32* [[I:%.*]], i64 -1
; CHECK-NEXT: ret i32* [[B]]
;
%notC = xor i64 -1, %C
%A = getelementptr i32, i32* %I, i64 %C
%B = getelementptr i32, i32* %A, i64 %notC
ret i32* %B
}
define i32 addrspace(1)* @ascast_0_gep(i32* %p) nounwind {
; CHECK-LABEL: @ascast_0_gep(
; CHECK-NEXT: [[X:%.*]] = addrspacecast i32* [[P:%.*]] to i32 addrspace(1)*
; CHECK-NEXT: ret i32 addrspace(1)* [[X]]
;
%gep = getelementptr i32, i32* %p, i32 0
%x = addrspacecast i32* %gep to i32 addrspace(1)*
ret i32 addrspace(1)* %x
}
; Do not merge the GEP and the addrspacecast, because it would undo the
; addrspacecast canonicalization.
define i32 addrspace(1)* @ascast_0_0_gep([128 x i32]* %p) nounwind {
; CHECK-LABEL: @ascast_0_0_gep(
; CHECK-NEXT: [[GEP:%.*]] = getelementptr [128 x i32], [128 x i32]* [[P:%.*]], i64 0, i64 0
; CHECK-NEXT: [[X:%.*]] = addrspacecast i32* [[GEP]] to i32 addrspace(1)*
; CHECK-NEXT: ret i32 addrspace(1)* [[X]]
;
%gep = getelementptr [128 x i32], [128 x i32]* %p, i32 0, i32 0
%x = addrspacecast i32* %gep to i32 addrspace(1)*
ret i32 addrspace(1)* %x
}
define <2 x i32*> @PR32414(i32** %ptr) {
; CHECK-LABEL: @PR32414(
; CHECK-NEXT: [[TMP0:%.*]] = bitcast i32** [[PTR:%.*]] to i32*
; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i32, i32* [[TMP0]], <2 x i64> <i64 0, i64 1>
; CHECK-NEXT: ret <2 x i32*> [[TMP1]]
;
%tmp0 = bitcast i32** %ptr to i32*
%tmp1 = getelementptr inbounds i32, i32* %tmp0, <2 x i64> <i64 0, i64 1>
ret <2 x i32*> %tmp1
}
define i32* @test_bitcast_nzgep([1 x i32]* %base, i64 %idx) {
; CHECK-LABEL: @test_bitcast_nzgep(
; CHECK-NEXT: [[PTR:%.*]] = getelementptr inbounds [1 x i32], [1 x i32]* [[BASE:%.*]], i64 0, i64 [[IDX:%.*]]
; CHECK-NEXT: ret i32* [[PTR]]
;
%base2 = bitcast [1 x i32]* %base to i32*
%ptr = getelementptr inbounds i32, i32* %base2, i64 %idx
ret i32* %ptr
}
define i32* @test_zgep_nzgep([1 x i32]* %base, i64 %idx) {
; CHECK-LABEL: @test_zgep_nzgep(
; CHECK-NEXT: [[PTR:%.*]] = getelementptr inbounds [1 x i32], [1 x i32]* [[BASE:%.*]], i64 0, i64 [[IDX:%.*]]
; CHECK-NEXT: ret i32* [[PTR]]
;
%base2 = getelementptr [1 x i32], [1 x i32]* %base, i64 0, i64 0
%ptr = getelementptr inbounds i32, i32* %base2, i64 %idx
ret i32* %ptr
}
define i32* @test_nzgep_zgep([1 x i32]* %base, i64 %idx) {
; CHECK-LABEL: @test_nzgep_zgep(
; CHECK-NEXT: [[PTR:%.*]] = getelementptr inbounds [1 x i32], [1 x i32]* [[BASE:%.*]], i64 [[IDX:%.*]], i64 0
; CHECK-NEXT: ret i32* [[PTR]]
;
%base2 = getelementptr inbounds [1 x i32], [1 x i32]* %base, i64 %idx
%ptr = getelementptr [1 x i32], [1 x i32]* %base2, i64 0, i64 0
ret i32* %ptr
}
define i32* @test_gep_inbounds_of_gep(i32* %base) {
; CHECK-LABEL: @test_gep_inbounds_of_gep(
; CHECK-NEXT: [[PTR2:%.*]] = getelementptr i32, i32* [[BASE:%.*]], i64 8
; CHECK-NEXT: ret i32* [[PTR2]]
;
%ptr1 = getelementptr i32, i32* %base, i64 4
%ptr2 = getelementptr inbounds i32, i32* %ptr1, i64 4
ret i32* %ptr2
}
%struct.f = type { i32 }
@g0 = internal unnamed_addr constant %struct.f zeroinitializer, align 4
@g1 = internal unnamed_addr constant %struct.f { i32 -1 }, align 4
define i32* @PR45084(i1 %cond) {
; CHECK-LABEL: @PR45084(
; CHECK-NEXT: [[GEP:%.*]] = select i1 [[COND:%.*]], i32* getelementptr inbounds ([[STRUCT_F:%.*]], %struct.f* @g0, i64 0, i32 0), i32* getelementptr inbounds ([[STRUCT_F]], %struct.f* @g1, i64 0, i32 0), !prof [[PROF0:![0-9]+]]
; CHECK-NEXT: ret i32* [[GEP]]
;
%sel = select i1 %cond, %struct.f* @g0, %struct.f* @g1, !prof !0
%gep = getelementptr inbounds %struct.f, %struct.f* %sel, i64 0, i32 0
ret i32* %gep
}
define i32* @PR45084_extra_use(i1 %cond, %struct.f** %p) {
; CHECK-LABEL: @PR45084_extra_use(
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[COND:%.*]], %struct.f* @g0, %struct.f* @g1
; CHECK-NEXT: store %struct.f* [[SEL]], %struct.f** [[P:%.*]], align 8
; CHECK-NEXT: [[GEP:%.*]] = select i1 [[COND]], i32* getelementptr inbounds ([[STRUCT_F:%.*]], %struct.f* @g0, i64 0, i32 0), i32* getelementptr inbounds ([[STRUCT_F]], %struct.f* @g1, i64 0, i32 0)
; CHECK-NEXT: ret i32* [[GEP]]
;
%sel = select i1 %cond, %struct.f* @g0, %struct.f* @g1
store %struct.f* %sel, %struct.f** %p
%gep = getelementptr %struct.f, %struct.f* %sel, i64 0, i32 0
ret i32* %gep
}
define i8* @gep_null_inbounds(i64 %idx) {
; CHECK-LABEL: @gep_null_inbounds(
; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, i8* null, i64 [[IDX:%.*]]
; CHECK-NEXT: ret i8* [[GEP]]
;
%gep = getelementptr inbounds i8, i8* null, i64 %idx
ret i8* %gep
}
define i8* @gep_null_not_inbounds(i64 %idx) {
; CHECK-LABEL: @gep_null_not_inbounds(
; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, i8* null, i64 [[IDX:%.*]]
; CHECK-NEXT: ret i8* [[GEP]]
;
%gep = getelementptr i8, i8* null, i64 %idx
ret i8* %gep
}
define i8* @gep_null_defined(i64 %idx) null_pointer_is_valid {
; CHECK-LABEL: @gep_null_defined(
; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, i8* null, i64 [[IDX:%.*]]
; CHECK-NEXT: ret i8* [[GEP]]
;
%gep = getelementptr inbounds i8, i8* null, i64 %idx
ret i8* %gep
}
define i8* @gep_null_inbounds_different_type(i64 %idx1, i64 %idx2) {
; CHECK-LABEL: @gep_null_inbounds_different_type(
; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [0 x i8], [0 x i8]* null, i64 0, i64 [[IDX2:%.*]]
; CHECK-NEXT: ret i8* [[GEP]]
;
%gep = getelementptr inbounds [0 x i8], [0 x i8]* null, i64 %idx1, i64 %idx2
ret i8* %gep
}
define i8* @D98588(i8* %c1, i64 %offset) {
; CHECK-LABEL: @D98588(
; CHECK-NEXT: [[C2:%.*]] = bitcast i8* [[C1:%.*]] to i64*
; CHECK-NEXT: [[C2_NEXT:%.*]] = getelementptr inbounds i64, i64* [[C2]], i64 [[OFFSET:%.*]]
; CHECK-NEXT: [[GEP:%.*]] = bitcast i64* [[C2_NEXT]] to i8*
; CHECK-NEXT: ret i8* [[GEP]]
;
%c2 = bitcast i8* %c1 to i64*
%c2_next = getelementptr inbounds i64, i64* %c2, i64 %offset
%ptrtoint1 = ptrtoint i8* %c1 to i64
%ptrtoint2 = ptrtoint i64* %c2_next to i64
%sub = sub i64 %ptrtoint2, %ptrtoint1 ; C2 - C1
%gep = getelementptr inbounds i8, i8* %c1, i64 %sub ; C1 + (C2 - C1)
ret i8* %gep
}
declare noalias i8* @malloc(i64) nounwind
define i32 @test_gep_bitcast_malloc(%struct.A* %a) {
; CHECK-LABEL: @test_gep_bitcast_malloc(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CALL:%.*]] = call noalias dereferenceable_or_null(16) i8* @malloc(i64 16)
; CHECK-NEXT: [[B:%.*]] = bitcast i8* [[CALL]] to %struct.A*
; CHECK-NEXT: [[G3:%.*]] = getelementptr [[STRUCT_A:%.*]], %struct.A* [[B]], i64 0, i32 2
; CHECK-NEXT: [[A_C:%.*]] = load i32, i32* [[G3]], align 4
; CHECK-NEXT: ret i32 [[A_C]]
;
entry:
%call = call noalias i8* @malloc(i64 16) #2
%B = bitcast i8* %call to %struct.A*
%g3 = getelementptr %struct.A, %struct.A* %B, i32 0, i32 2
%a_c = load i32, i32* %g3, align 4
ret i32 %a_c
}
!0 = !{!"branch_weights", i32 2, i32 10}
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