96 lines
4.6 KiB
LLVM
96 lines
4.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; Verify that calls to snprintf with members of constant structs as arguments
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; are folded to constants as expected.
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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declare i32 @snprintf(i8*, i64, i8*, ...)
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%struct.A = type { [5 x i8], [6 x i8], [7 x i8] }
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@a = constant [2 x %struct.A] [%struct.A { [5 x i8] c"1\00\00\00\00", [6 x i8] c"12\00\00\00\00", [7 x i8] c"123\00\00\00\00" }, %struct.A { [5 x i8] c"1234\00", [6 x i8] c"12345\00", [7 x i8] c"123456\00" }]
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@pcnt_s = constant [3 x i8] c"%s\00"
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; Fold snprintf(0, 0, "%s", a[I].M + C) for constant I in [0, 1],
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; member M in [a, b, c], and C in a valid range to a constant.
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define void @fold_snprintf_member_pC(i32* %pi) {
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; CHECK-LABEL: @fold_snprintf_member_pC(
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; CHECK-NEXT: store i32 1, i32* [[PI:%.*]], align 4
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; CHECK-NEXT: [[PIA0AP1:%.*]] = getelementptr i32, i32* [[PI]], i64 1
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; CHECK-NEXT: store i32 0, i32* [[PIA0AP1]], align 4
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; CHECK-NEXT: [[PIA0B:%.*]] = getelementptr i32, i32* [[PI]], i64 2
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; CHECK-NEXT: store i32 2, i32* [[PIA0B]], align 4
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; CHECK-NEXT: [[PIA0BP1:%.*]] = getelementptr i32, i32* [[PI]], i64 3
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; CHECK-NEXT: store i32 1, i32* [[PIA0BP1]], align 4
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; CHECK-NEXT: [[PIA0BP2:%.*]] = getelementptr i32, i32* [[PI]], i64 4
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; CHECK-NEXT: store i32 0, i32* [[PIA0BP2]], align 4
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; CHECK-NEXT: [[PIA0C:%.*]] = getelementptr i32, i32* [[PI]], i64 5
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; CHECK-NEXT: store i32 3, i32* [[PIA0C]], align 4
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; CHECK-NEXT: [[PIA1A:%.*]] = getelementptr i32, i32* [[PI]], i64 6
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; CHECK-NEXT: store i32 4, i32* [[PIA1A]], align 4
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; CHECK-NEXT: [[PIA1B:%.*]] = getelementptr i32, i32* [[PI]], i64 7
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; CHECK-NEXT: store i32 5, i32* [[PIA1B]], align 4
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; CHECK-NEXT: [[PIA1C:%.*]] = getelementptr i32, i32* [[PI]], i64 8
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; CHECK-NEXT: store i32 6, i32* [[PIA1C]], align 4
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; CHECK-NEXT: ret void
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;
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%fmt = getelementptr [3 x i8], [3 x i8]* @pcnt_s, i32 0, i32 0
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; Fold snprintf(0, 0, "%s", a[0].a) to 1.
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%pa0a = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 0, i64 0
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%ia0a = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* %fmt, i8* %pa0a)
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%pia0a = getelementptr i32, i32* %pi, i32 0
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store i32 %ia0a, i32* %pia0a
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; Fold snprintf(0, 0, "%s", a[0].a) to 0.
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%pa0ap1 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 0, i64 1
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%ia0ap1 = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* %fmt, i8* %pa0ap1)
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%pia0ap1 = getelementptr i32, i32* %pi, i32 1
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store i32 %ia0ap1, i32* %pia0ap1
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; Fold snprintf(0, 0, "%s", a[0].b) to 2.
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%pa0b = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 0
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%ia0b = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* %fmt, i8* %pa0b)
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%pia0b = getelementptr i32, i32* %pi, i32 2
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store i32 %ia0b, i32* %pia0b
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; Fold snprintf(0, 0, "%s", a[0].b + 1) to 1.
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%pa0bp1 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 1
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%ia0bp1 = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* %fmt, i8* %pa0bp1)
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%pia0bp1 = getelementptr i32, i32* %pi, i32 3
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store i32 %ia0bp1, i32* %pia0bp1
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; Fold snprintf(0, 0, "%s", a[0].b + 2) to 0.
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%pa0bp2 = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 1, i64 2
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%ia0bp2 = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* %fmt, i8* %pa0bp2)
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%pia0bp2 = getelementptr i32, i32* %pi, i32 4
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store i32 %ia0bp2, i32* %pia0bp2
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; Fold snprintf(0, 0, "%s", a[0].c) to 3.
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%pa0c = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 0, i32 2, i64 0
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%ia0c = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* %fmt, i8* %pa0c)
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%pia0c = getelementptr i32, i32* %pi, i32 5
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store i32 %ia0c, i32* %pia0c
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; Fold snprintf(0, 0, "%s", a[1].a) to 4.
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%pa1a = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 0, i64 0
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%ia1a = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* %fmt, i8* %pa1a)
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%pia1a = getelementptr i32, i32* %pi, i32 6
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store i32 %ia1a, i32* %pia1a
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; Fold snprintf(0, 0, "%s", a[1].b) to 5.
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%pa1b = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 1, i64 0
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%ia1b = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* %fmt, i8* %pa1b)
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%pia1b = getelementptr i32, i32* %pi, i32 7
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store i32 %ia1b, i32* %pia1b
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; Fold snprintf(0, 0, "%s", a[1].c) to 6.
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%pa1c = getelementptr [2 x %struct.A], [2 x %struct.A]* @a, i64 0, i64 1, i32 2, i64 0
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%ia1c = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* %fmt, i8* %pa1c)
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%pia1c = getelementptr i32, i32* %pi, i32 8
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store i32 %ia1c, i32* %pia1c
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ret void
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}
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