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clang-p2996/llvm/test/Transforms/InstCombine/strlen-7.ll
Martin Sebor cc2ce81bd8 [SimplifyLibcalls] Tests for libcall folding of subobjects [NFC] 
Add tests exercising the future enancement of folding library function
calls with arguments involving subobjects such as elements of arrays
or struct members.
2022-05-06 10:43:02 -06:00

229 lines
13 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; Verify that strlen calls with members of constant structs are folded.
;
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
declare i64 @strlen(i8*)
%struct.A = type { [4 x i8], [5 x i8] }
@a = constant [2 x %struct.A] [%struct.A { [4 x i8] c"1\00\00\00", [5 x i8] c"12\00\00\00" }, %struct.A { [4 x i8] c"123\00", [5 x i8] c"1234\00" }], align 16
; Fold strlen(a[I].a + J) and strlen(a[I].b + J) with constant I and J
; to constants.
define void @fold_strlen_A(i64* %plen) {
; CHECK-LABEL: @fold_strlen_A(
; CHECK-NEXT: [[LENA0A:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 0, i64 0))
; CHECK-NEXT: store i64 [[LENA0A]], i64* [[PLEN:%.*]], align 4
; CHECK-NEXT: [[LENA0AP1:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 0, i64 1))
; CHECK-NEXT: [[PLEN1:%.*]] = getelementptr i64, i64* [[PLEN]], i64 1
; CHECK-NEXT: store i64 [[LENA0AP1]], i64* [[PLEN1]], align 4
; CHECK-NEXT: [[LENA0AP2:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 0, i64 2))
; CHECK-NEXT: [[PLEN2:%.*]] = getelementptr i64, i64* [[PLEN]], i64 2
; CHECK-NEXT: store i64 [[LENA0AP2]], i64* [[PLEN2]], align 4
; CHECK-NEXT: [[LENA0AP3:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 0, i64 3))
; CHECK-NEXT: [[PLEN3:%.*]] = getelementptr i64, i64* [[PLEN]], i64 3
; CHECK-NEXT: store i64 [[LENA0AP3]], i64* [[PLEN3]], align 4
; CHECK-NEXT: [[LENA0B:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 0))
; CHECK-NEXT: [[PLEN4:%.*]] = getelementptr i64, i64* [[PLEN]], i64 4
; CHECK-NEXT: store i64 [[LENA0B]], i64* [[PLEN4]], align 4
; CHECK-NEXT: [[LENA0BP1:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 1))
; CHECK-NEXT: [[PLEN5:%.*]] = getelementptr i64, i64* [[PLEN]], i64 5
; CHECK-NEXT: store i64 [[LENA0BP1]], i64* [[PLEN5]], align 4
; CHECK-NEXT: [[LENA0BP2:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 2))
; CHECK-NEXT: [[PLEN6:%.*]] = getelementptr i64, i64* [[PLEN]], i64 6
; CHECK-NEXT: store i64 [[LENA0BP2]], i64* [[PLEN6]], align 4
; CHECK-NEXT: [[LENA0BP3:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 3))
; CHECK-NEXT: [[PLEN7:%.*]] = getelementptr i64, i64* [[PLEN]], i64 7
; CHECK-NEXT: store i64 [[LENA0BP3]], i64* [[PLEN7]], align 4
; CHECK-NEXT: [[LENA0BP4:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 4))
; CHECK-NEXT: [[PLEN8:%.*]] = getelementptr i64, i64* [[PLEN]], i64 8
; CHECK-NEXT: store i64 [[LENA0BP4]], i64* [[PLEN8]], align 4
; CHECK-NEXT: [[LENA1A:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 0, i64 0))
; CHECK-NEXT: [[PLEN9:%.*]] = getelementptr i64, i64* [[PLEN]], i64 9
; CHECK-NEXT: store i64 [[LENA1A]], i64* [[PLEN9]], align 4
; CHECK-NEXT: [[LENA1AP1:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 0, i64 1))
; CHECK-NEXT: [[PLEN10:%.*]] = getelementptr i64, i64* [[PLEN]], i64 10
; CHECK-NEXT: store i64 [[LENA1AP1]], i64* [[PLEN10]], align 4
; CHECK-NEXT: [[LENA1AP2:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 0, i64 2))
; CHECK-NEXT: [[PLEN11:%.*]] = getelementptr i64, i64* [[PLEN]], i64 11
; CHECK-NEXT: store i64 [[LENA1AP2]], i64* [[PLEN11]], align 4
; CHECK-NEXT: [[LENA1AP3:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 0, i64 3))
; CHECK-NEXT: [[PLEN12:%.*]] = getelementptr i64, i64* [[PLEN]], i64 12
; CHECK-NEXT: store i64 [[LENA1AP3]], i64* [[PLEN12]], align 4
; CHECK-NEXT: [[LENA1B:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 0))
; CHECK-NEXT: [[PLEN14:%.*]] = getelementptr i64, i64* [[PLEN]], i64 14
; CHECK-NEXT: store i64 [[LENA1B]], i64* [[PLEN14]], align 4
; CHECK-NEXT: [[LENA1BP1:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 1))
; CHECK-NEXT: [[PLEN15:%.*]] = getelementptr i64, i64* [[PLEN]], i64 15
; CHECK-NEXT: store i64 [[LENA1BP1]], i64* [[PLEN15]], align 4
; CHECK-NEXT: [[LENA1BP2:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 2))
; CHECK-NEXT: [[PLEN16:%.*]] = getelementptr i64, i64* [[PLEN]], i64 16
; CHECK-NEXT: store i64 [[LENA1BP2]], i64* [[PLEN16]], align 4
; CHECK-NEXT: [[LENA1BP3:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 3))
; CHECK-NEXT: [[PLEN17:%.*]] = getelementptr i64, i64* [[PLEN]], i64 17
; CHECK-NEXT: store i64 [[LENA1BP3]], i64* [[PLEN17]], align 4
; CHECK-NEXT: [[LENA1BP4:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 4))
; CHECK-NEXT: [[PLEN18:%.*]] = getelementptr i64, i64* [[PLEN]], i64 18
; CHECK-NEXT: store i64 [[LENA1BP4]], i64* [[PLEN18]], align 4
; CHECK-NEXT: ret void
;
; Fold strlen(a[0].a) to 1.
%pa0a = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 0, i64 0
%lena0a = call i64 @strlen(i8* %pa0a)
%plen0 = getelementptr i64, i64* %plen, i32 0
store i64 %lena0a, i64* %plen0
; Fold strlen(a[0].a + 1) to 0.
%pa0ap1 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 0, i64 1
%lena0ap1 = call i64 @strlen(i8* %pa0ap1)
%plen1 = getelementptr i64, i64* %plen, i32 1
store i64 %lena0ap1, i64* %plen1
; Fold strlen(a[0].a + 2) to 0.
%pa0ap2 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 0, i64 2
%lena0ap2 = call i64 @strlen(i8* %pa0ap2)
%plen2 = getelementptr i64, i64* %plen, i32 2
store i64 %lena0ap2, i64* %plen2
; Fold strlen(a[0].a + 3) to 0.
%pa0ap3 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 0, i64 3
%lena0ap3 = call i64 @strlen(i8* %pa0ap3)
%plen3 = getelementptr i64, i64* %plen, i32 3
store i64 %lena0ap3, i64* %plen3
; Fold strlen(a[0].b) to 2.
%pa0b = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 0
%lena0b = call i64 @strlen(i8* %pa0b)
%plen4 = getelementptr i64, i64* %plen, i32 4
store i64 %lena0b, i64* %plen4
; Fold strlen(a[0].b + 1) to 1.
%pa0bp1 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 1
%lena0bp1 = call i64 @strlen(i8* %pa0bp1)
%plen5 = getelementptr i64, i64* %plen, i32 5
store i64 %lena0bp1, i64* %plen5
; Fold strlen(a[0].b + 2) to 0.
%pa0bp2 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 2
%lena0bp2 = call i64 @strlen(i8* %pa0bp2)
%plen6 = getelementptr i64, i64* %plen, i32 6
store i64 %lena0bp2, i64* %plen6
; Fold strlen(a[0].b + 3) to 0.
%pa0bp3 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 3
%lena0bp3 = call i64 @strlen(i8* %pa0bp3)
%plen7 = getelementptr i64, i64* %plen, i32 7
store i64 %lena0bp3, i64* %plen7
; Fold strlen(a[0].b + 4) to 0.
%pa0bp4 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 4
%lena0bp4 = call i64 @strlen(i8* %pa0bp4)
%plen8 = getelementptr i64, i64* %plen, i32 8
store i64 %lena0bp4, i64* %plen8
; Fold strlen(a[1].a) to 3.
%pa1a = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 0, i64 0
%lena1a = call i64 @strlen(i8* %pa1a)
%plen9 = getelementptr i64, i64* %plen, i32 9
store i64 %lena1a, i64* %plen9
; Fold strlen(a[1].a + 1) to 2.
%pa1ap1 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 0, i64 1
%lena1ap1 = call i64 @strlen(i8* %pa1ap1)
%plen10 = getelementptr i64, i64* %plen, i32 10
store i64 %lena1ap1, i64* %plen10
; Fold strlen(a[1].a + 2) to 1.
%pa1ap2 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 0, i64 2
%lena1ap2 = call i64 @strlen(i8* %pa1ap2)
%plen11 = getelementptr i64, i64* %plen, i32 11
store i64 %lena1ap2, i64* %plen11
; Fold strlen(a[1].a + 3) to 0.
%pa1ap3 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 0, i64 3
%lena1ap3 = call i64 @strlen(i8* %pa1ap3)
%plen12 = getelementptr i64, i64* %plen, i32 12
store i64 %lena1ap3, i64* %plen12
; Fold strlen(a[1].b) to 4.
%pa1b = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 0
%lena1b = call i64 @strlen(i8* %pa1b)
%plen14 = getelementptr i64, i64* %plen, i32 14
store i64 %lena1b, i64* %plen14
; Fold strlen(a[1].b + 1) to 3.
%pa1bp1 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 1
%lena1bp1 = call i64 @strlen(i8* %pa1bp1)
%plen15 = getelementptr i64, i64* %plen, i32 15
store i64 %lena1bp1, i64* %plen15
; Fold strlen(a[1].b + 2) to 2.
%pa1bp2 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 2
%lena1bp2 = call i64 @strlen(i8* %pa1bp2)
%plen16 = getelementptr i64, i64* %plen, i32 16
store i64 %lena1bp2, i64* %plen16
; Fold strlen(a[1].b + 3) to 1.
%pa1bp3 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 3
%lena1bp3 = call i64 @strlen(i8* %pa1bp3)
%plen17 = getelementptr i64, i64* %plen, i32 17
store i64 %lena1bp3, i64* %plen17
; Fold strlen(a[1].b + 4) to 0.
%pa1bp4 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 4
%lena1bp4 = call i64 @strlen(i8* %pa1bp4)
%plen18 = getelementptr i64, i64* %plen, i32 18
store i64 %lena1bp4, i64* %plen18
ret void
}
; TODO: Fold strlen(a[I].a + X) and strlen(a[I].b + X) with constant I and
; variable X to (X - strlen(a[I].a)) and (X - strlen(a[I].b)) respectively.
define void @fold_strlen_A_pI(i64* %plen, i64 %I) {
; CHECK-LABEL: @fold_strlen_A_pI(
; CHECK-NEXT: [[PA0A:%.*]] = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 0, i64 [[I:%.*]]
; CHECK-NEXT: [[LENA0A:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) [[PA0A]])
; CHECK-NEXT: store i64 [[LENA0A]], i64* [[PLEN:%.*]], align 4
; CHECK-NEXT: [[PA0B:%.*]] = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 [[I]]
; CHECK-NEXT: [[LENA0B:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) [[PA0B]])
; CHECK-NEXT: [[PLEN1:%.*]] = getelementptr i64, i64* [[PLEN]], i64 1
; CHECK-NEXT: store i64 [[LENA0B]], i64* [[PLEN1]], align 4
; CHECK-NEXT: [[PA1A:%.*]] = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 0, i64 [[I]]
; CHECK-NEXT: [[LENA1A:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) [[PA1A]])
; CHECK-NEXT: [[PLEN2:%.*]] = getelementptr i64, i64* [[PLEN]], i64 2
; CHECK-NEXT: store i64 [[LENA1A]], i64* [[PLEN2]], align 4
; CHECK-NEXT: [[PA1B:%.*]] = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 [[I]]
; CHECK-NEXT: [[LENA1B:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) [[PA1B]])
; CHECK-NEXT: [[PLEN3:%.*]] = getelementptr i64, i64* [[PLEN]], i64 3
; CHECK-NEXT: store i64 [[LENA1B]], i64* [[PLEN3]], align 4
; CHECK-NEXT: ret void
;
%pa0a = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 0, i64 %I
%lena0a = call i64 @strlen(i8* %pa0a)
%plen0 = getelementptr i64, i64* %plen, i32 0
store i64 %lena0a, i64* %plen0
%pa0b = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 %I
%lena0b = call i64 @strlen(i8* %pa0b)
%plen1 = getelementptr i64, i64* %plen, i32 1
store i64 %lena0b, i64* %plen1
%pa1a = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 0, i64 %I
%lena1a = call i64 @strlen(i8* %pa1a)
%plen2 = getelementptr i64, i64* %plen, i32 2
store i64 %lena1a, i64* %plen2
%pa1b = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 %I
%lena1b = call i64 @strlen(i8* %pa1b)
%plen3 = getelementptr i64, i64* %plen, i32 3
store i64 %lena1b, i64* %plen3
ret void
}
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