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| -rw-r--r-- | test/CodeGen/X86/2006-01-19-ISelFoldingBug.ll | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2006-01-19-ISelFoldingBug.ll b/test/CodeGen/X86/2006-01-19-ISelFoldingBug.ll new file mode 100644 index 0000000000..4dc9165434 --- /dev/null +++ b/test/CodeGen/X86/2006-01-19-ISelFoldingBug.ll @@ -0,0 +1,15 @@ +; RUN: llvm-as < %s | llc -march=x86 | grep 'shld' | wc -l | grep 1 +; +; Check that the isel does not fold the shld, which already folds a load +; and has two uses, into a store. +%A = external global uint + +uint %test5(uint %B, ubyte %C) { + %tmp.1 = load uint *%A; + %tmp.2 = shl uint %tmp.1, ubyte %C + %tmp.3 = sub ubyte 32, %C + %tmp.4 = shr uint %B, ubyte %tmp.3 + %tmp.5 = or uint %tmp.4, %tmp.2 + store uint %tmp.5, uint* %A + ret uint %tmp.5 +} |