From a0bb692b2702843fa4b60b271879d4b0102b8c91 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Wed, 12 Jan 2005 18:38:26 +0000 Subject: [PATCH] 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 --- lib/Target/X86/X86ISelPattern.cpp | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/lib/Target/X86/X86ISelPattern.cpp b/lib/Target/X86/X86ISelPattern.cpp index 194c2fa517c..cc22506295f 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,