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98ea64f7a1
This patch is part of a stack that teaches Clang to generate Key Instructions metadata for C and C++. The Key Instructions project is introduced, including a "quick summary" section at the top which adds context for this PR, here: https://discourse.llvm.org/t/rfc-improving-is-stmt-placement-for-better-interactive-debugging/82668 The feature is only functional in LLVM if LLVM is built with CMake flag LLVM_EXPERIMENTAL_KEY_INSTRUCTIONs. Eventually that flag will be removed. The Clang-side work is demoed here: https://github.com/llvm/llvm-project/pull/130943
47 lines
2.1 KiB
C
47 lines
2.1 KiB
C
// RUN: %clang -gkey-instructions -x c++ -std=c++17 %s -gmlt -S -emit-llvm -o - \
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// RUN: | FileCheck %s --implicit-check-not atomGroup --implicit-check-not atomRank --check-prefixes=CHECK,CHECK-CXX
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// RUN: %clang -gkey-instructions -x c %s -gmlt -S -emit-llvm -o - \
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// RUN: | FileCheck %s --implicit-check-not atomGroup --implicit-check-not atomRank
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int g;
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void a(int A) {
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// The branch is a key instruction, with the condition being its backup.
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// CHECK: entry:
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// CHECK: %tobool = icmp ne i32 %0, 0{{.*}}, !dbg [[G1R2:!.*]]
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// CHECK: br i1 %tobool, label %if.then, label %if.end{{.*}}, !dbg [[G1R1:!.*]]
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if (A)
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;
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// The assignment in the if gets a distinct source atom group.
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// CHECK: if.end:
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// CHECK: %1 = load i32, ptr %A.addr{{.*}}, !dbg [[G2R2:!.*]]
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// CHECK: store i32 %1, ptr @g{{.*}}, !dbg [[G2R1:!.*]]
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// CHECK: %tobool1 = icmp ne i32 %1, 0{{.*}}, !dbg [[G3R2:!.*]]
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// CHECK: br i1 %tobool1, label %if.then2, label %if.end3{{.*}}, !dbg [[G3R1:!.*]]
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if ((g = A))
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;
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#ifdef __cplusplus
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// The assignment in the if gets a distinct source atom group.
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// CHECK-CXX: if.end3:
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// CHECK-CXX: %2 = load i32, ptr %A.addr{{.*}}, !dbg [[G4R2:!.*]]
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// CHECK-CXX: store i32 %2, ptr %B{{.*}}, !dbg [[G4R1:!.*]]
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// CHECK-CXX: %tobool4 = icmp ne i32 %3, 0{{.*}}, !dbg [[G5R2:!.*]]
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// CHECK-CXX: br i1 %tobool4, label %if.then5, label %if.end6{{.*}}, !dbg [[G5R1:!.*]]
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if (int B = A; B)
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;
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#endif
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}
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// CHECK: [[G1R2]] = !DILocation({{.*}}, atomGroup: 1, atomRank: 2)
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// CHECK: [[G1R1]] = !DILocation({{.*}}, atomGroup: 1, atomRank: 1)
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// CHECK: [[G2R2]] = !DILocation({{.*}}, atomGroup: 2, atomRank: 2)
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// CHECK: [[G2R1]] = !DILocation({{.*}}, atomGroup: 2, atomRank: 1)
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// CHECK: [[G3R2]] = !DILocation({{.*}}, atomGroup: 3, atomRank: 2)
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// CHECK: [[G3R1]] = !DILocation({{.*}}, atomGroup: 3, atomRank: 1)
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// CHECK-CXX: [[G4R2]] = !DILocation({{.*}}, atomGroup: 4, atomRank: 2)
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// CHECK-CXX: [[G4R1]] = !DILocation({{.*}}, atomGroup: 4, atomRank: 1)
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// CHECK-CXX: [[G5R2]] = !DILocation({{.*}}, atomGroup: 5, atomRank: 2)
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// CHECK-CXX: [[G5R1]] = !DILocation({{.*}}, atomGroup: 5, atomRank: 1)
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