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| author | Duncan Sands <baldrick@free.fr> | 2010-11-21 13:53:09 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2010-11-21 13:53:09 +0000 |
| commit | cf4bceba49a8ce888ec205b90a2159256ec915bd (patch) | |
| tree | ad487eeca0239e263ebbdef334b7654d95076024 /llvm/test | |
| parent | 1f86be9164d4cf049e63659238d5fceea4a7174d (diff) | |
| download | bcm5719-llvm-cf4bceba49a8ce888ec205b90a2159256ec915bd.tar.gz bcm5719-llvm-cf4bceba49a8ce888ec205b90a2159256ec915bd.zip | |
Add a rather pointless InstructionSimplify transform, inspired by recent constant
folding improvements: if P points to a type of size zero, turn "gep P, N" into "P".
More generally, if a gep index type has size zero, instcombine could replace the
index with zero, but that is not done here.
llvm-svn: 119942
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/2010-11-21-SizeZeroTypeGEP.ll | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/2010-11-21-SizeZeroTypeGEP.ll b/llvm/test/Transforms/InstCombine/2010-11-21-SizeZeroTypeGEP.ll new file mode 100644 index 00000000000..24da5bb3df2 --- /dev/null +++ b/llvm/test/Transforms/InstCombine/2010-11-21-SizeZeroTypeGEP.ll @@ -0,0 +1,8 @@ +; RUN: opt < %s -instcombine -S | not grep getelementptr + +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" + +define {}* @foo({}* %x, i32 %n) { + %p = getelementptr {}* %x, i32 %n + ret {}* %p +} |
