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| author | Dan Gohman <gohman@apple.com> | 2009-05-05 21:10:19 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-05-05 21:10:19 +0000 |
| commit | 5412d06e9c352c9795f4a71b91c4f869585866eb (patch) | |
| tree | b9dd046cc5947a1881033e8a0c35e6bbd85d944b /test/CodeGen/X86/omit-label.ll | |
| parent | 8c87ae229c43939f5868b5778c53e787df0927ef (diff) | |
| download | external_llvm-5412d06e9c352c9795f4a71b91c4f869585866eb.zip external_llvm-5412d06e9c352c9795f4a71b91c4f869585866eb.tar.gz external_llvm-5412d06e9c352c9795f4a71b91c4f869585866eb.tar.bz2 | |
If a MachineBasicBlock has multiple ways of reaching another block,
allow it to have multiple CFG edges to that block. This is needed
to allow MachineBasicBlock::isOnlyReachableByFallthrough to work
correctly. This fixes PR4126.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71018 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/omit-label.ll')
| -rw-r--r-- | test/CodeGen/X86/omit-label.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/CodeGen/X86/omit-label.ll b/test/CodeGen/X86/omit-label.ll new file mode 100644 index 0000000..457b66b --- /dev/null +++ b/test/CodeGen/X86/omit-label.ll @@ -0,0 +1,23 @@ +; RUN: llvm-as < %s | llc -march=x86-64 | grep BB1_1: +; PR4126 + +; Don't omit this label's definition. + +define void @bux(i32 %p_53) nounwind optsize { +entry: + %0 = icmp eq i32 %p_53, 0 ; <i1> [#uses=1] + %1 = icmp sgt i32 %p_53, 0 ; <i1> [#uses=1] + %or.cond = and i1 %0, %1 ; <i1> [#uses=1] + br i1 %or.cond, label %bb.i, label %bb3 + +bb.i: ; preds = %entry + %2 = add i32 %p_53, 1 ; <i32> [#uses=1] + %3 = icmp slt i32 %2, 0 ; <i1> [#uses=0] + br label %bb3 + +bb3: ; preds = %bb.i, %entry + %4 = tail call i32 (...)* @baz(i32 0) nounwind ; <i32> [#uses=0] + ret void +} + +declare i32 @baz(...) |