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| author | Dan Gohman <gohman@apple.com> | 2008-06-13 21:43:41 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-06-13 21:43:41 +0000 |
| commit | 87bc2f19f8d72a9a5ea25bf711fba75baafe8562 (patch) | |
| tree | 9b72fd57418359f66f6cf908fe0323d13befa225 /test | |
| parent | ab39f9ab71286ba352e9685d6744e4a95f6ebf33 (diff) | |
| download | external_llvm-87bc2f19f8d72a9a5ea25bf711fba75baafe8562.zip external_llvm-87bc2f19f8d72a9a5ea25bf711fba75baafe8562.tar.gz external_llvm-87bc2f19f8d72a9a5ea25bf711fba75baafe8562.tar.bz2 | |
Protect ChangeCompareStride from situations in which it is possible
for it to generate use-before-def IR, such as in this testcase.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52258 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/LoopStrengthReduce/change-compare-stride-trickiness.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/Transforms/LoopStrengthReduce/change-compare-stride-trickiness.ll b/test/Transforms/LoopStrengthReduce/change-compare-stride-trickiness.ll new file mode 100644 index 0000000..9a54b7b --- /dev/null +++ b/test/Transforms/LoopStrengthReduce/change-compare-stride-trickiness.ll @@ -0,0 +1,20 @@ +; RUN: llvm-as < %s | llc +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" +target triple = "x86_64-apple-darwin9" + +define void @foo() { +entry: + br label %loop + +loop: + %indvar = phi i32 [ 0, %entry ], [ %i.2.0.us1534, %loop ] ; <i32> [#uses=1] + %i.2.0.us1534 = add i32 %indvar, 1 ; <i32> [#uses=3] + %tmp611.us1535 = icmp eq i32 %i.2.0.us1534, 4 ; <i1> [#uses=2] + %tmp623.us1538 = select i1 %tmp611.us1535, i32 6, i32 0 ; <i32> [#uses=0] + %tmp628.us1540 = shl i32 %i.2.0.us1534, 1 ; <i32> [#uses=1] + %tmp645646647.us1547 = sext i32 %tmp628.us1540 to i64 ; <i64> [#uses=0] + br i1 %tmp611.us1535, label %exit, label %loop + +exit: + ret void +} |