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| author | David Tellenbach <david.tellenbach@arm.com> | 2019-09-20 13:22:59 +0000 |
|---|---|---|
| committer | David Tellenbach <david.tellenbach@arm.com> | 2019-09-20 13:22:59 +0000 |
| commit | 2a47c77e720a24f808bf6230d0a56bc969258b86 (patch) | |
| tree | e44515f084cfca1a9b4ffbcfcda0bfc3ec05b488 /llvm/test | |
| parent | 4a13c828f6d78e49eabffc7b57f805ca46a2a827 (diff) | |
| download | bcm5719-llvm-2a47c77e720a24f808bf6230d0a56bc969258b86.tar.gz bcm5719-llvm-2a47c77e720a24f808bf6230d0a56bc969258b86.zip | |
[FastISel] Fix insertion of unconditional branches during FastISel
The insertion of an unconditional branch during FastISel can differ depending on
building with or without debug information. This happens because FastISel::fastEmitBranch
emits an unconditional branch depending on the size of the current basic block
without distinguishing between debug and non-debug instructions.
This patch fixes this issue by ignoring debug instructions when getting the size
of the basic block.
Reviewers: aprantl
Reviewed By: aprantl
Subscribers: ormris, aprantl, hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D67703
llvm-svn: 372389
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/CodeGen/AArch64/fast-isel-branch-uncond-debug.ll | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/AArch64/fast-isel-branch-uncond-debug.ll b/llvm/test/CodeGen/AArch64/fast-isel-branch-uncond-debug.ll new file mode 100644 index 00000000000..902ec7a9c09 --- /dev/null +++ b/llvm/test/CodeGen/AArch64/fast-isel-branch-uncond-debug.ll @@ -0,0 +1,44 @@ +; RUN: llc -mtriple=aarch64-arm-none-eabi -O1 -opt-bisect-limit=2 -o - %s 2> /dev/null | FileCheck %s + +define dso_local i32 @a() #0 !dbg !7 { +entry: +; CHECK: b .LBB0_1 +; CHECK: .LBB0_1: + call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !DIExpression()), !dbg !13 + br label %for.cond, !dbg !14 + +; CHECK: b .LBB0_1 +; CHECK: .Lfunc_end0: +for.cond: + br label %for.cond, !dbg !15, !llvm.loop !18 +} +declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1 + +declare void @llvm.dbg.value(metadata, metadata, metadata) #2 + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!3, !4, !5} +!llvm.ident = !{!6} + +!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) +!1 = !DIFile(filename: "fast-isel-branch-uncond-debug.ll", directory: "/tmp") +!2 = !{} +!3 = !{i32 2, !"Dwarf Version", i32 4} +!4 = !{i32 2, !"Debug Info Version", i32 3} +!5 = !{i32 1, !"wchar_size", i32 4} +!6 = !{!""} +!7 = distinct !DISubprogram(name: "a", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) +!8 = !DISubroutineType(types: !9) +!9 = !{!10} +!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) +!11 = !{!12} +!12 = !DILocalVariable(name: "b", scope: !7, file: !1, line: 2, type: !10) +!13 = !DILocation(line: 0, scope: !7) +!14 = !DILocation(line: 3, column: 3, scope: !7) +!15 = !DILocation(line: 3, column: 3, scope: !16) +!16 = distinct !DILexicalBlock(scope: !17, file: !1, line: 3, column: 3) +!17 = distinct !DILexicalBlock(scope: !7, file: !1, line: 3, column: 3) +!18 = distinct !{!18, !19, !20} +!19 = !DILocation(line: 3, column: 3, scope: !17) +!20 = !DILocation(line: 4, column: 5, scope: !17) +
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