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| author | Chris Lattner <sabre@nondot.org> | 2005-01-12 18:38:26 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-01-12 18:38:26 +0000 |
| commit | a0bb692b2702843fa4b60b271879d4b0102b8c91 (patch) | |
| tree | d1b9982181f3bc64e0340cd3c9e5b3e89ba33d06 | |
| parent | 5c884562279927757cbe0ae718ab18af730ddb35 (diff) | |
We can only fold a load into an op if there is exactly one use of the value.
Checking to see if the load has two uses is not equivalent, as the chain
value may have zero uses.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19518 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/X86ISelPattern.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Target/X86/X86ISelPattern.cpp b/lib/Target/X86/X86ISelPattern.cpp index 194c2fa517..cc22506295 100644 --- a/lib/Target/X86/X86ISelPattern.cpp +++ b/lib/Target/X86/X86ISelPattern.cpp @@ -979,7 +979,8 @@ bool ISel::isFoldableLoad(SDOperand Op) { // If this load has already been emitted, we clearly can't fold it. if (ExprMap.count(Op)) return false; - return Op.Val->use_size() == 2; + // Finally, there can only be one use of its value. + return Op.Val->hasNUsesOfValue(1, 0); } /// EmitFoldedLoad - Ensure that the arguments of the load are code generated, |