diff options
| author | Chris Lattner <sabre@nondot.org> | 2008-10-15 05:18:04 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-10-15 05:18:04 +0000 |
| commit | d53886bb488fbef11b8083d7e99bcf53a51861a0 (patch) | |
| tree | 5b97f9c19f087db50374e9980467b07a3722133c | |
| parent | 160f6cc209068e5e2db6514a010d5a32cf28be4f (diff) | |
fold compare of null pointer into compare with 0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57553 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/X86FastISel.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp index 954a3a0640..e04e91a7ac 100644 --- a/lib/Target/X86/X86FastISel.cpp +++ b/lib/Target/X86/X86FastISel.cpp @@ -549,6 +549,10 @@ bool X86FastISel::X86FastEmitCompare(Value *Op0, Value *Op1, MVT VT) { unsigned Op0Reg = getRegForValue(Op0); if (Op0Reg == 0) return false; + // Handle 'null' like i32/i64 0. + if (isa<ConstantPointerNull>(Op1)) + Op1 = Constant::getNullValue(TD.getIntPtrType()); + // We have two options: compare with register or immediate. If the RHS of // the compare is an immediate that we can fold into this compare, use // CMPri, otherwise use CMPrr. |