Handle (store &GV -> mem) as a store immediate. This often occurs for
printf format strings and other stuff. Instead of generating this:
movl $l1__2E_str_1, %eax
movl %eax, (%esp)
we now emit:
movl $l1__2E_str_1, (%esp)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21406 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelPattern.cpp b/lib/Target/X86/X86ISelPattern.cpp
index 949cda9..262e028 100644
--- a/lib/Target/X86/X86ISelPattern.cpp
+++ b/lib/Target/X86/X86ISelPattern.cpp
@@ -3120,6 +3120,20 @@
addFullAddress(BuildMI(BB, Opc, 4+1), AM).addImm(CN->getValue());
return;
}
+ } else if (GlobalAddressSDNode *GA =
+ dyn_cast<GlobalAddressSDNode>(N.getOperand(1))) {
+ assert(GA->getValueType(0) == MVT::i32 && "Bad pointer operand");
+
+ if (getRegPressure(N.getOperand(0)) > getRegPressure(N.getOperand(2))) {
+ Select(N.getOperand(0));
+ SelectAddress(N.getOperand(2), AM);
+ } else {
+ SelectAddress(N.getOperand(2), AM);
+ Select(N.getOperand(0));
+ }
+ addFullAddress(BuildMI(BB, X86::MOV32mi, 4+1),
+ AM).addGlobalAddress(GA->getGlobal());
+ return;
}
// Check to see if this is a load/op/store combination.