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4794bbffb228894de3ca0dad50fc027eb94f743e
clang-p2996/llvm/test/Transforms/InstCombine/load-cmp.ll
Sanjay Patel cc88445a91 [InstCombine] canonicalize 'icmp (trunc X), C' to 'icmp (X & Mask), C' 
I looked at canonicalizing in the other direction, but that causes
many potential regressions and infinite loops because we already
(possibly wrongly) canonicalize "trunc X to i1" into an and+icmp.

This has a data layout restriction to avoid creating illegal
mask instructions, but we could remove that if we can show
that the backend can undo this when needed.

The motivating example from issue #56119 is modeled by the
PhaseOrdering test.
2022-06-30 15:51:39 -04:00

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9.4 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=instcombine -S -data-layout="p:32:32:32-p1:16:16:16-n8:16:32:64" < %s | FileCheck %s
@G16 = internal constant [10 x i16] [i16 35, i16 82, i16 69, i16 81, i16 85,
i16 73, i16 82, i16 69, i16 68, i16 0]
@G16_as1 = internal addrspace(1) constant [10 x i16] [i16 35, i16 82, i16 69, i16 81, i16 85,
i16 73, i16 82, i16 69, i16 68, i16 0]
@GD = internal constant [6 x double]
[double -10.0, double 1.0, double 4.0, double 2.0, double -20.0, double -40.0]
%Foo = type { i32, i32, i32, i32 }
@GS = internal constant %Foo { i32 1, i32 4, i32 9, i32 14 }
@GStructArr = internal constant [4 x %Foo] [ %Foo { i32 1, i32 4, i32 9, i32 14 },
%Foo { i32 5, i32 4, i32 6, i32 11 },
%Foo { i32 6, i32 5, i32 9, i32 20 },
%Foo { i32 12, i32 3, i32 9, i32 8 } ]
define i1 @test1(i32 %X) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[R:%.*]] = icmp eq i32 [[X:%.*]], 9
; CHECK-NEXT: ret i1 [[R]]
;
%P = getelementptr inbounds [10 x i16], [10 x i16]* @G16, i32 0, i32 %X
%Q = load i16, i16* %P
%R = icmp eq i16 %Q, 0
ret i1 %R
}
define i1 @test1_noinbounds(i32 %X) {
; CHECK-LABEL: @test1_noinbounds(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[X:%.*]], 2147483647
; CHECK-NEXT: [[R:%.*]] = icmp eq i32 [[TMP1]], 9
; CHECK-NEXT: ret i1 [[R]]
;
%P = getelementptr [10 x i16], [10 x i16]* @G16, i32 0, i32 %X
%Q = load i16, i16* %P
%R = icmp eq i16 %Q, 0
ret i1 %R
}
define i1 @test1_noinbounds_i64(i64 %X) {
; CHECK-LABEL: @test1_noinbounds_i64(
; CHECK-NEXT: [[TMP1:%.*]] = and i64 [[X:%.*]], 2147483647
; CHECK-NEXT: [[R:%.*]] = icmp eq i64 [[TMP1]], 9
; CHECK-NEXT: ret i1 [[R]]
;
%P = getelementptr [10 x i16], [10 x i16]* @G16, i64 0, i64 %X
%Q = load i16, i16* %P
%R = icmp eq i16 %Q, 0
ret i1 %R
}
define i1 @test1_noinbounds_as1(i32 %x) {
; CHECK-LABEL: @test1_noinbounds_as1(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[X:%.*]], 32767
; CHECK-NEXT: [[R:%.*]] = icmp eq i32 [[TMP1]], 9
; CHECK-NEXT: ret i1 [[R]]
;
%p = getelementptr [10 x i16], [10 x i16] addrspace(1)* @G16_as1, i16 0, i32 %x
%q = load i16, i16 addrspace(1)* %p
%r = icmp eq i16 %q, 0
ret i1 %r
}
define i1 @test2(i32 %X) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[R:%.*]] = icmp ne i32 [[X:%.*]], 4
; CHECK-NEXT: ret i1 [[R]]
;
%P = getelementptr inbounds [10 x i16], [10 x i16]* @G16, i32 0, i32 %X
%Q = load i16, i16* %P
%R = icmp slt i16 %Q, 85
ret i1 %R
}
define i1 @test3(i32 %X) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[R:%.*]] = icmp eq i32 [[X:%.*]], 1
; CHECK-NEXT: ret i1 [[R]]
;
%P = getelementptr inbounds [6 x double], [6 x double]* @GD, i32 0, i32 %X
%Q = load double, double* %P
%R = fcmp oeq double %Q, 1.0
ret i1 %R
}
define i1 @test4(i32 %X) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 933, [[X:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], 1
; CHECK-NEXT: [[R:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-NEXT: ret i1 [[R]]
;
%P = getelementptr inbounds [10 x i16], [10 x i16]* @G16, i32 0, i32 %X
%Q = load i16, i16* %P
%R = icmp sle i16 %Q, 73
ret i1 %R
}
define i1 @test4_i16(i16 %X) {
; CHECK-LABEL: @test4_i16(
; CHECK-NEXT: [[TMP1:%.*]] = zext i16 [[X:%.*]] to i32
; CHECK-NEXT: [[TMP2:%.*]] = lshr i32 933, [[TMP1]]
; CHECK-NEXT: [[TMP3:%.*]] = and i32 [[TMP2]], 1
; CHECK-NEXT: [[R:%.*]] = icmp ne i32 [[TMP3]], 0
; CHECK-NEXT: ret i1 [[R]]
;
%P = getelementptr inbounds [10 x i16], [10 x i16]* @G16, i32 0, i16 %X
%Q = load i16, i16* %P
%R = icmp sle i16 %Q, 73
ret i1 %R
}
define i1 @test5(i32 %X) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[X:%.*]], 2
; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[X]], 7
; CHECK-NEXT: [[R:%.*]] = or i1 [[TMP1]], [[TMP2]]
; CHECK-NEXT: ret i1 [[R]]
;
%P = getelementptr inbounds [10 x i16], [10 x i16]* @G16, i32 0, i32 %X
%Q = load i16, i16* %P
%R = icmp eq i16 %Q, 69
ret i1 %R
}
define i1 @test6(i32 %X) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[X:%.*]], -1
; CHECK-NEXT: [[R:%.*]] = icmp ult i32 [[TMP1]], 3
; CHECK-NEXT: ret i1 [[R]]
;
%P = getelementptr inbounds [6 x double], [6 x double]* @GD, i32 0, i32 %X
%Q = load double, double* %P
%R = fcmp ogt double %Q, 0.0
ret i1 %R
}
define i1 @test7(i32 %X) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[X:%.*]], -4
; CHECK-NEXT: [[R:%.*]] = icmp ult i32 [[TMP1]], -3
; CHECK-NEXT: ret i1 [[R]]
;
%P = getelementptr inbounds [6 x double], [6 x double]* @GD, i32 0, i32 %X
%Q = load double, double* %P
%R = fcmp olt double %Q, 0.0
ret i1 %R
}
define i1 @test8(i32 %X) {
; CHECK-LABEL: @test8(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[X:%.*]], -2
; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 8
; CHECK-NEXT: ret i1 [[TMP2]]
;
%P = getelementptr inbounds [10 x i16], [10 x i16]* @G16, i32 0, i32 %X
%Q = load i16, i16* %P
%R = and i16 %Q, 3
%S = icmp eq i16 %R, 0
ret i1 %S
}
@GA = internal constant [4 x { i32, i32 } ] [
{ i32, i32 } { i32 1, i32 0 },
{ i32, i32 } { i32 2, i32 1 },
{ i32, i32 } { i32 3, i32 1 },
{ i32, i32 } { i32 4, i32 0 }
]
define i1 @test9(i32 %X) {
; CHECK-LABEL: @test9(
; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[X:%.*]], -1
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i32 [[TMP1]], 2
; CHECK-NEXT: ret i1 [[TMP2]]
;
%P = getelementptr inbounds [4 x { i32, i32 } ], [4 x { i32, i32 } ]* @GA, i32 0, i32 %X, i32 1
%Q = load i32, i32* %P
%R = icmp eq i32 %Q, 1
ret i1 %R
}
define i1 @test10_struct(i32 %x) {
; CHECK-LABEL: @test10_struct(
; CHECK-NEXT: ret i1 false
;
%p = getelementptr inbounds %Foo, %Foo* @GS, i32 %x, i32 0
%q = load i32, i32* %p
%r = icmp eq i32 %q, 9
ret i1 %r
}
define i1 @test10_struct_noinbounds(i32 %x) {
; CHECK-LABEL: @test10_struct_noinbounds(
; CHECK-NEXT: [[P:%.*]] = getelementptr [[FOO:%.*]], %Foo* @GS, i32 [[X:%.*]], i32 0
; CHECK-NEXT: [[Q:%.*]] = load i32, i32* [[P]], align 8
; CHECK-NEXT: [[R:%.*]] = icmp eq i32 [[Q]], 9
; CHECK-NEXT: ret i1 [[R]]
;
%p = getelementptr %Foo, %Foo* @GS, i32 %x, i32 0
%q = load i32, i32* %p
%r = icmp eq i32 %q, 9
ret i1 %r
}
; Test that the GEP indices are converted before we ever get here
; Index < ptr size
define i1 @test10_struct_i16(i16 %x){
; CHECK-LABEL: @test10_struct_i16(
; CHECK-NEXT: ret i1 false
;
%p = getelementptr inbounds %Foo, %Foo* @GS, i16 %x, i32 0
%q = load i32, i32* %p
%r = icmp eq i32 %q, 0
ret i1 %r
}
; Test that the GEP indices are converted before we ever get here
; Index > ptr size
define i1 @test10_struct_i64(i64 %x){
; CHECK-LABEL: @test10_struct_i64(
; CHECK-NEXT: ret i1 false
;
%p = getelementptr inbounds %Foo, %Foo* @GS, i64 %x, i32 0
%q = load i32, i32* %p
%r = icmp eq i32 %q, 0
ret i1 %r
}
define i1 @test10_struct_noinbounds_i16(i16 %x) {
; CHECK-LABEL: @test10_struct_noinbounds_i16(
; CHECK-NEXT: [[TMP1:%.*]] = sext i16 [[X:%.*]] to i32
; CHECK-NEXT: [[P:%.*]] = getelementptr [[FOO:%.*]], %Foo* @GS, i32 [[TMP1]], i32 0
; CHECK-NEXT: [[Q:%.*]] = load i32, i32* [[P]], align 8
; CHECK-NEXT: [[R:%.*]] = icmp eq i32 [[Q]], 0
; CHECK-NEXT: ret i1 [[R]]
;
%p = getelementptr %Foo, %Foo* @GS, i16 %x, i32 0
%q = load i32, i32* %p
%r = icmp eq i32 %q, 0
ret i1 %r
}
define i1 @test10_struct_arr(i32 %x) {
; CHECK-LABEL: @test10_struct_arr(
; CHECK-NEXT: [[R:%.*]] = icmp ne i32 [[X:%.*]], 1
; CHECK-NEXT: ret i1 [[R]]
;
%p = getelementptr inbounds [4 x %Foo], [4 x %Foo]* @GStructArr, i32 0, i32 %x, i32 2
%q = load i32, i32* %p
%r = icmp eq i32 %q, 9
ret i1 %r
}
define i1 @test10_struct_arr_noinbounds(i32 %x) {
; CHECK-LABEL: @test10_struct_arr_noinbounds(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[X:%.*]], 268435455
; CHECK-NEXT: [[R:%.*]] = icmp ne i32 [[TMP1]], 1
; CHECK-NEXT: ret i1 [[R]]
;
%p = getelementptr [4 x %Foo], [4 x %Foo]* @GStructArr, i32 0, i32 %x, i32 2
%q = load i32, i32* %p
%r = icmp eq i32 %q, 9
ret i1 %r
}
define i1 @test10_struct_arr_i16(i16 %x) {
; CHECK-LABEL: @test10_struct_arr_i16(
; CHECK-NEXT: [[R:%.*]] = icmp ne i16 [[X:%.*]], 1
; CHECK-NEXT: ret i1 [[R]]
;
%p = getelementptr inbounds [4 x %Foo], [4 x %Foo]* @GStructArr, i16 0, i16 %x, i32 2
%q = load i32, i32* %p
%r = icmp eq i32 %q, 9
ret i1 %r
}
define i1 @test10_struct_arr_i64(i64 %x) {
; CHECK-LABEL: @test10_struct_arr_i64(
; CHECK-NEXT: [[TMP1:%.*]] = and i64 [[X:%.*]], 4294967295
; CHECK-NEXT: [[R:%.*]] = icmp ne i64 [[TMP1]], 1
; CHECK-NEXT: ret i1 [[R]]
;
%p = getelementptr inbounds [4 x %Foo], [4 x %Foo]* @GStructArr, i64 0, i64 %x, i32 2
%q = load i32, i32* %p
%r = icmp eq i32 %q, 9
ret i1 %r
}
define i1 @test10_struct_arr_noinbounds_i16(i16 %x) {
; CHECK-LABEL: @test10_struct_arr_noinbounds_i16(
; CHECK-NEXT: [[TMP1:%.*]] = sext i16 [[X:%.*]] to i32
; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], 268435455
; CHECK-NEXT: [[R:%.*]] = icmp ne i32 [[TMP2]], 1
; CHECK-NEXT: ret i1 [[R]]
;
%p = getelementptr [4 x %Foo], [4 x %Foo]* @GStructArr, i32 0, i16 %x, i32 2
%q = load i32, i32* %p
%r = icmp eq i32 %q, 9
ret i1 %r
}
define i1 @test10_struct_arr_noinbounds_i64(i64 %x) {
; CHECK-LABEL: @test10_struct_arr_noinbounds_i64(
; CHECK-NEXT: [[TMP1:%.*]] = and i64 [[X:%.*]], 268435455
; CHECK-NEXT: [[R:%.*]] = icmp ne i64 [[TMP1]], 1
; CHECK-NEXT: ret i1 [[R]]
;
%p = getelementptr [4 x %Foo], [4 x %Foo]* @GStructArr, i32 0, i64 %x, i32 2
%q = load i32, i32* %p
%r = icmp eq i32 %q, 9
ret i1 %r
}
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