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author | Dan Gohman <gohman@apple.com> | 2008-11-05 22:56:47 +0000 |
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committer | Dan Gohman <gohman@apple.com> | 2008-11-05 22:56:47 +0000 |
commit | 33a9cb4f403651e11e53a9b223048c7e03218e9d (patch) | |
tree | 3c6bea29f1f883df7e2a916114bef24bf0bcdae4 /test/CodeGen/PowerPC/delete-node.ll | |
parent | 8ad09197868f53060c2ddd9e5328fcfca51d1952 (diff) | |
download | llvm-33a9cb4f403651e11e53a9b223048c7e03218e9d.tar.gz llvm-33a9cb4f403651e11e53a9b223048c7e03218e9d.tar.bz2 llvm-33a9cb4f403651e11e53a9b223048c7e03218e9d.tar.xz |
Make ISel ignore dead nodes. The DAGCombiner normally eliminates
dead nodes, but in this case its missing one. Fixing the DAGCombiner
is desirable, but it's somewhat involved.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58777 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/PowerPC/delete-node.ll')
-rw-r--r-- | test/CodeGen/PowerPC/delete-node.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test/CodeGen/PowerPC/delete-node.ll b/test/CodeGen/PowerPC/delete-node.ll new file mode 100644 index 0000000000..0b1d734f8a --- /dev/null +++ b/test/CodeGen/PowerPC/delete-node.ll @@ -0,0 +1,22 @@ +; RUN: llvm-as < %s | llc -march=ppc32 + +; The DAGCombiner leaves behind a dead node in this testcase. Currently +; ISel is ignoring dead nodes, though it would be preferable for +; DAGCombiner to be able to eliminate the dead node. + +define void @GrayATo32ARGBTabB(i8* %baseAddr, i16** %cmp, i32 %rowBytes) nounwind { +entry: + br label %bb1 + +bb1: ; preds = %bb1, %entry + %0 = load i16* null, align 2 ; <i16> [#uses=1] + %1 = ashr i16 %0, 4 ; <i16> [#uses=1] + %2 = sext i16 %1 to i32 ; <i32> [#uses=1] + %3 = getelementptr i8* null, i32 %2 ; <i8*> [#uses=1] + %4 = load i8* %3, align 1 ; <i8> [#uses=1] + %5 = zext i8 %4 to i32 ; <i32> [#uses=1] + %6 = shl i32 %5, 24 ; <i32> [#uses=1] + %7 = or i32 0, %6 ; <i32> [#uses=1] + store i32 %7, i32* null, align 4 + br label %bb1 +} |