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| author | Evan Cheng <evan.cheng@apple.com> | 2010-01-19 19:45:51 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-01-19 19:45:51 +0000 |
| commit | 590d16be6f335da07c66f3c92693d0e8a2f40069 (patch) | |
| tree | 09708195f1b3d6aae1d8e9770c05efe1c4eb985e /test/CodeGen | |
| parent | 91093ecf0fed6f007e08f1a4531cdb6f438672a2 (diff) | |
| download | llvm-590d16be6f335da07c66f3c92693d0e8a2f40069.tar.gz llvm-590d16be6f335da07c66f3c92693d0e8a2f40069.tar.bz2 llvm-590d16be6f335da07c66f3c92693d0e8a2f40069.tar.xz | |
Do not extend extension results beyond the use of a PHI instruction at the start of a use block. A PHI use is expected to kill its source values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93895 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
| -rw-r--r-- | test/CodeGen/X86/2010-01-19-OptExtBug.ll | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2010-01-19-OptExtBug.ll b/test/CodeGen/X86/2010-01-19-OptExtBug.ll new file mode 100644 index 0000000000..cd8960b9ed --- /dev/null +++ b/test/CodeGen/X86/2010-01-19-OptExtBug.ll @@ -0,0 +1,57 @@ +; RUN: llc < %s -mtriple=x86_64-apple-darwin11 -relocation-model=pic -disable-fp-elim -stats |& not grep ext-opt + +define fastcc i8* @S_scan_str(i8* %start, i32 %keep_quoted, i32 %keep_delims) nounwind ssp { +entry: + switch i8 undef, label %bb6 [ + i8 9, label %bb5 + i8 32, label %bb5 + i8 10, label %bb5 + i8 13, label %bb5 + i8 12, label %bb5 + ] + +bb5: ; preds = %entry, %entry, %entry, %entry, %entry + br label %bb6 + +bb6: ; preds = %bb5, %entry + br i1 undef, label %bb7, label %bb9 + +bb7: ; preds = %bb6 + unreachable + +bb9: ; preds = %bb6 + %0 = load i8* undef, align 1 ; <i8> [#uses=3] + br i1 undef, label %bb12, label %bb10 + +bb10: ; preds = %bb9 + br i1 undef, label %bb12, label %bb11 + +bb11: ; preds = %bb10 + unreachable + +bb12: ; preds = %bb10, %bb9 + br i1 undef, label %bb13, label %bb14 + +bb13: ; preds = %bb12 + store i8 %0, i8* undef, align 1 + %1 = zext i8 %0 to i32 ; <i32> [#uses=1] + br label %bb18 + +bb14: ; preds = %bb12 + br label %bb18 + +bb18: ; preds = %bb14, %bb13 + %termcode.0 = phi i32 [ %1, %bb13 ], [ undef, %bb14 ] ; <i32> [#uses=2] + %2 = icmp eq i8 %0, 0 ; <i1> [#uses=1] + br i1 %2, label %bb21, label %bb19 + +bb19: ; preds = %bb18 + br i1 undef, label %bb21, label %bb20 + +bb20: ; preds = %bb19 + br label %bb21 + +bb21: ; preds = %bb20, %bb19, %bb18 + %termcode.1 = phi i32 [ %termcode.0, %bb18 ], [ %termcode.0, %bb19 ], [ undef, %bb20 ] ; <i32> [#uses=0] + unreachable +} |