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| author | Devang Patel <dpatel@apple.com> | 2008-08-13 02:05:14 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2008-08-13 02:05:14 +0000 |
| commit | d16aba22c9eca0b2576a5fe5507f3c8ab378942e (patch) | |
| tree | 663d79774ee4172e4b26234c2a64a1ac3896058b /test/Transforms/LoopStrengthReduce/2008-08-13-CmpStride.ll | |
| parent | 6f83be0c6128938662009b9877d7e80ff5d496f2 (diff) | |
| download | external_llvm-d16aba22c9eca0b2576a5fe5507f3c8ab378942e.zip external_llvm-d16aba22c9eca0b2576a5fe5507f3c8ab378942e.tar.gz external_llvm-d16aba22c9eca0b2576a5fe5507f3c8ab378942e.tar.bz2 | |
Check sign to detect overflow before changing compare stride.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54710 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LoopStrengthReduce/2008-08-13-CmpStride.ll')
| -rw-r--r-- | test/Transforms/LoopStrengthReduce/2008-08-13-CmpStride.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/Transforms/LoopStrengthReduce/2008-08-13-CmpStride.ll b/test/Transforms/LoopStrengthReduce/2008-08-13-CmpStride.ll new file mode 100644 index 0000000..fbd3c1e --- /dev/null +++ b/test/Transforms/LoopStrengthReduce/2008-08-13-CmpStride.ll @@ -0,0 +1,31 @@ +; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep add | count 2 +; PR 2662 +@g_3 = common global i16 0 ; <i16*> [#uses=2] +@"\01LC" = internal constant [4 x i8] c"%d\0A\00" ; <[4 x i8]*> [#uses=1] + +define void @func_1() nounwind { +entry: + br label %bb + +bb: ; preds = %bb, %entry + %l_2.0.reg2mem.0 = phi i16 [ 0, %entry ], [ %t1, %bb ] ; <i16> [#uses=2] + %t0 = shl i16 %l_2.0.reg2mem.0, 1 ; <i16>:0 [#uses=1] + volatile store i16 %t0, i16* @g_3, align 2 + %t1 = add i16 %l_2.0.reg2mem.0, -3 ; <i16>:1 [#uses=2] + %t2 = icmp slt i16 %t1, 1 ; <i1>:2 [#uses=1] + br i1 %t2, label %bb, label %return + +return: ; preds = %bb + ret void +} + +define i32 @main() nounwind { +entry: + tail call void @func_1( ) nounwind + volatile load i16* @g_3, align 2 ; <i16>:0 [#uses=1] + zext i16 %0 to i32 ; <i32>:1 [#uses=1] + tail call i32 (i8*, ...)* @printf( i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), i32 %1 ) nounwind ; <i32>:2 [#uses=0] + ret i32 0 +} + +declare i32 @printf(i8*, ...) nounwind |