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| author | Quentin Colombet <qcolombet@apple.com> | 2013-06-18 20:14:39 +0000 |
|---|---|---|
| committer | Quentin Colombet <qcolombet@apple.com> | 2013-06-18 20:14:39 +0000 |
| commit | a3fb49cd851cd3b593fc653dc3ba4434c2e1232f (patch) | |
| tree | 0f949913fa9c0c45d128a5d477cf2bde7ca8b1b9 /test/CodeGen/X86/2007-10-12-CoalesceExtSubReg.ll | |
| parent | 571dd98ea4d6bf911c3b46a20ca3b5e3b341b21f (diff) | |
| download | external_llvm-a3fb49cd851cd3b593fc653dc3ba4434c2e1232f.zip external_llvm-a3fb49cd851cd3b593fc653dc3ba4434c2e1232f.tar.gz external_llvm-a3fb49cd851cd3b593fc653dc3ba4434c2e1232f.tar.bz2 | |
During SelectionDAG building explicitly set a node to constant zero when the
value is zero.
This allows optmizations to kick in more easily.
Fix some test cases so that they remain meaningful (i.e., not completely dead
coded) when optimizations apply.
<rdar://problem/14096009> superfluous multiply by high part of zero-extended
value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184222 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/2007-10-12-CoalesceExtSubReg.ll')
| -rw-r--r-- | test/CodeGen/X86/2007-10-12-CoalesceExtSubReg.ll | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/test/CodeGen/X86/2007-10-12-CoalesceExtSubReg.ll b/test/CodeGen/X86/2007-10-12-CoalesceExtSubReg.ll index 8091bd1..d3a47ae 100644 --- a/test/CodeGen/X86/2007-10-12-CoalesceExtSubReg.ll +++ b/test/CodeGen/X86/2007-10-12-CoalesceExtSubReg.ll @@ -7,8 +7,10 @@ entry: cond_next127: ; preds = %cond_next391, %entry %v.1 = phi i32 [ undef, %entry ], [ %tmp411, %cond_next391 ] ; <i32> [#uses=1] %tmp149 = mul i32 0, %v.1 ; <i32> [#uses=0] - %tmp254 = and i32 0, 15 ; <i32> [#uses=1] - %tmp256 = and i32 0, 15 ; <i32> [#uses=2] + %tmpss = load i32* %ss, align 4 ; <i32> [#uses=1] + %tmpbp = load i32* %bp, align 4 ; <i32> [#uses=2] + %tmp254 = and i32 %tmpss, 15 ; <i32> [#uses=1] + %tmp256 = and i32 %tmpbp, 15 ; <i32> [#uses=2] br label %cond_next391 cond_next391: ; preds = %cond_next127 |