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Handle (store &GV -> mem) as a store immediate. This often occurs for

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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
This commit is contained in:
Chris Lattner 2005-04-21 19:03:24 +00:00
parent 8e827e8661
commit 75f354bd7a
1 changed files with 14 additions and 0 deletions
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14
lib/Target/X86/X86ISelPattern.cpp
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@ -3120,6 +3120,20 @@ void ISel::Select(SDOperand N) {
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.