ac42923c2d
This reverts commit e6529dcedb3955706a8af5710591f1ac1bac26a3 with crash fixed. Original PR https://github.com/llvm/llvm-project/pull/134647 This patch is part of a stack that teaches Clang to generate Key Instructions metadata for C and C++. RFC: 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.
100 lines
4.4 KiB
C++
100 lines
4.4 KiB
C++
// RUN: %clang_cc1 -triple x86_64-linux-gnu -gkey-instructions %s -debug-info-kind=line-tables-only -emit-llvm -o - \
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// RUN: | FileCheck %s
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// Perennial question: should the inc be its own source atom or not
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// (currently it is).
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// FIXME: See do.c and while.c regarding cmp and cond br groups.
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// The stores in the setup (stores to __RANGE1, __BEGIN1, __END1) are all
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// marked as Key. Unclear whether that's desirable. Keep for now as that's
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// least risky (at worst it introduces an unnecessary step while debugging,
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// as opposed to potentially losing one we want).
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// Check the conditional branch (and the condition) in FOR_COND and
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// unconditional branch in FOR_BODY are Key Instructions.
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struct Range {
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int *begin();
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int *end();
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} r;
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// CHECK-LABEL: define dso_local void @_Z1av(
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// CHECK-SAME: ) #[[ATTR0:[0-9]+]] !dbg [[DBG10:![0-9]+]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: [[__RANGE1:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[__BEGIN1:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[__END1:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
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// CHECK-NEXT: store ptr @r, ptr [[__RANGE1]], align 8, !dbg [[DBG14:![0-9]+]]
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// CHECK-NEXT: [[CALL:%.*]] = call noundef ptr @_ZN5Range5beginEv(ptr noundef nonnull align 1 dereferenceable(1) @r), !dbg [[DBG15:![0-9]+]]
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// CHECK-NEXT: store ptr [[CALL]], ptr [[__BEGIN1]], align 8, !dbg [[DBG16:![0-9]+]]
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// CHECK-NEXT: [[CALL1:%.*]] = call noundef ptr @_ZN5Range3endEv(ptr noundef nonnull align 1 dereferenceable(1) @r), !dbg [[DBG17:![0-9]+]]
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// CHECK-NEXT: store ptr [[CALL1]], ptr [[__END1]], align 8, !dbg [[DBG18:![0-9]+]]
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// CHECK-NEXT: br label %[[FOR_COND:.*]], !dbg [[DBG19:![0-9]+]]
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// CHECK: [[FOR_COND]]:
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[__BEGIN1]], align 8, !dbg [[DBG19]]
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// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[__END1]], align 8, !dbg [[DBG19]]
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// CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[TMP0]], [[TMP1]], !dbg [[DBG20:![0-9]+]]
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// CHECK-NEXT: br i1 [[CMP]], label %[[FOR_BODY:.*]], label %[[FOR_END:.*]], !dbg [[DBG21:![0-9]+]]
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// CHECK: [[FOR_BODY]]:
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// CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[__BEGIN1]], align 8, !dbg [[DBG19]]
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// CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[TMP2]], align 4, !dbg [[DBG22:![0-9]+]]
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// CHECK-NEXT: store i32 [[TMP3]], ptr [[I]], align 4, !dbg [[DBG23:![0-9]+]]
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// CHECK-NEXT: br label %[[FOR_INC:.*]], !dbg [[DBG24:![0-9]+]]
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// CHECK: [[FOR_INC]]:
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// CHECK-NEXT: [[TMP4:%.*]] = load ptr, ptr [[__BEGIN1]], align 8, !dbg [[DBG19]]
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// CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds nuw i32, ptr [[TMP4]], i32 1, !dbg [[DBG25:![0-9]+]]
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// CHECK-NEXT: store ptr [[INCDEC_PTR]], ptr [[__BEGIN1]], align 8, !dbg [[DBG26:![0-9]+]]
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// CHECK-NEXT: br label %[[FOR_COND]], !dbg [[DBG19]], !llvm.loop
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// CHECK: [[FOR_END]]:
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// CHECK-NEXT: ret void, !dbg [[DBG30:![0-9]+]]
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//
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void a() {
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for (int i: r)
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;
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}
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// - Check the branch out of the body gets an atom group (and gets it correct
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// if there's ctrl-flow in the body).
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void b() {
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for (int i: r) {
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if (i)
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;
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// CHECK: entry:
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// CHECK: if.end:
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// CHECK-NEXT: br label %for.inc, !dbg [[b_br:!.*]]
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}
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}
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// - Check an immediate loop exit (`break` in this case) gets an atom group and
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// - doesn't cause a crash.
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void c() {
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for (int i: r)
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// CHECK: entry:
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// CHECK: for.body:
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// CHECK: br label %for.end, !dbg [[c_br:!.*]]
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break;
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}
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//.
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// CHECK: [[DBG14]] = !DILocation({{.*}}, atomGroup: 1, atomRank: 1)
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// CHECK: [[DBG15]] = !DILocation({{.*}}, atomGroup: 2, atomRank: 2)
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// CHECK: [[DBG16]] = !DILocation({{.*}}, atomGroup: 2, atomRank: 1)
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// CHECK: [[DBG17]] = !DILocation({{.*}}, atomGroup: 3, atomRank: 2)
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// CHECK: [[DBG18]] = !DILocation({{.*}}, atomGroup: 3, atomRank: 1)
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// CHECK: [[DBG19]] = !DILocation({{.*}})
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// CHECK: [[DBG20]] = !DILocation({{.*}}, atomGroup: 4, atomRank: 1)
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// CHECK: [[DBG21]] = !DILocation({{.*}}, atomGroup: 5, atomRank: 1)
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// CHECK: [[DBG22]] = !DILocation({{.*}}, atomGroup: 6, atomRank: 2)
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// CHECK: [[DBG23]] = !DILocation({{.*}}, atomGroup: 6, atomRank: 1)
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// CHECK: [[DBG24]] = !DILocation({{.*}} atomGroup: 8, atomRank: 1)
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// CHECK: [[DBG25]] = !DILocation({{.*}}, atomGroup: 7, atomRank: 2)
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// CHECK: [[DBG26]] = !DILocation({{.*}}, atomGroup: 7, atomRank: 1)
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// CHECK: [[DBG30]] = !DILocation({{.*}})
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//
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// CHECK: [[b_br]] = !DILocation({{.*}}, atomGroup: [[#]], atomRank: [[#]])
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//
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// CHECK: [[c_br]] = !DILocation({{.*}}, atomGroup: [[#]], atomRank: [[#]])
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//.
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