diff options
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/test/Regression/Transforms/InstCombine/2002-09-08-PointerShiftBug.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/llvm/test/Regression/Transforms/InstCombine/2002-09-08-PointerShiftBug.ll b/llvm/test/Regression/Transforms/InstCombine/2002-09-08-PointerShiftBug.ll new file mode 100644 index 00000000000..7c84cf25939 --- /dev/null +++ b/llvm/test/Regression/Transforms/InstCombine/2002-09-08-PointerShiftBug.ll @@ -0,0 +1,20 @@ +; This tests for a bug exposed by the Olden health benchmark where a shift of a +; pointer was thrown away, causing this whole example to be "optimized" away, +; which was quite bogus. Check that this is fixed. +; +; RUN: as < %s | opt -instcombine | dis | grep reg162 + +implementation ; Functions: + +int %test(uint %cann-indvar) { + %reg189-scale = mul uint %cann-indvar, 4294967295 ; <uint> [#uses=1] + %reg189 = add uint %reg189-scale, 3 ; <uint> [#uses=1] + %cast362 = cast uint %reg189 to int ; <int> [#uses=1] + %cast363 = cast int %cast362 to sbyte* ; <sbyte*> [#uses=2] + %reg160 = shl sbyte* %cast363, ubyte 1 ; <sbyte*> [#uses=1] + %reg161 = add sbyte* %reg160, %cast363 ; <sbyte*> [#uses=1] + %reg162 = shl sbyte* %reg161, ubyte 2 ; <sbyte*> [#uses=1] + %RV = cast sbyte* %reg162 to int ; <int> [#uses=1] + ret int %RV +} + |
