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Set CR1EQ only when lowering vararg floating arguments (not any vararg 

arguments as before), unset CR1EQ otherwise.

llvm-svn: 138802
This commit is contained in:
Roman Divacky 2011-08-30 17:04:16 +00:00
parent 87cec4d172
commit 71038e7021
3 changed files with 28 additions and 2 deletions
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8
llvm/lib/Target/PowerPC/PPCISelLowering.cpp
View File

@ -2946,6 +2946,7 @@ PPCTargetLowering::LowerCall_SVR4(SDValue Chain, SDValue Callee,
SmallVector<TailCallArgumentInfo, 8> TailCallArguments;
SmallVector<SDValue, 8> MemOpChains;
bool seenFloatArg = false;
// Walk the register/memloc assignments, inserting copies/loads.
for (unsigned i = 0, j = 0, e = ArgLocs.size();
i != e;
@ -2990,6 +2991,7 @@ PPCTargetLowering::LowerCall_SVR4(SDValue Chain, SDValue Callee,
}
if (VA.isRegLoc()) {
seenFloatArg |= VA.getLocVT().isFloatingPoint();
// Put argument in a physical register.
RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
} else {
@ -3016,9 +3018,11 @@ PPCTargetLowering::LowerCall_SVR4(SDValue Chain, SDValue Callee,
Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
&MemOpChains[0], MemOpChains.size());
// Set CR6 to true if this is a vararg call.
// Set CR6 to true if this is a vararg call with floating args passed in
// registers.
if (isVarArg) {
SDValue SetCR(DAG.getMachineNode(PPC::CRSET, dl, MVT::i32), 0);
SDValue SetCR(DAG.getMachineNode(seenFloatArg ? PPC::CRSET : PPC::CRUNSET,
dl, MVT::i32), 0);
RegsToPass.push_back(std::make_pair(unsigned(PPC::CR1EQ), SetCR));
}

4
llvm/lib/Target/PowerPC/PPCInstrInfo.td
View File

@ -1053,6 +1053,10 @@ def CRSET : XLForm_1_ext<19, 289, (outs CRBITRC:$dst), (ins),
"creqv $dst, $dst, $dst", BrCR,
[]>;
def CRUNSET: XLForm_1_ext<19, 193, (outs CRBITRC:$dst), (ins),
"crxor $dst, $dst, $dst", BrCR,
[]>;
// XFX-Form instructions. Instructions that deal with SPRs.
//
let Uses = [CTR] in {

18
llvm/test/CodeGen/PowerPC/cr1eq.ll Normal file
View File

@ -0,0 +1,18 @@
; RUN: llc < %s | FileCheck %s
; ModuleID = 'test.c'
target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32"
target triple = "powerpc-unknown-freebsd"
@.str = private unnamed_addr constant [4 x i8] c"%i\0A\00", align 1
@.str1 = private unnamed_addr constant [4 x i8] c"%f\0A\00", align 1
define void @foo() nounwind {
entry:
; CHECK: crxor 6, 6, 6
%call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i32 0, i32 0), i32 1)
; CHECK: creqv 6, 6, 6
%call1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str1, i32 0, i32 0), double 1.100000e+00)
ret void
}
declare i32 @printf(i8*, ...)