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[mips] Do not use function CC_MipsN_VarArg unless the function being analyzed

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is a vararg function.

The original code was examining flag OutputArg::IsFixed to determine whether
CC_MipsN_VarArg or CC_MipsN should be called. This is not correct, since this
flag is often set to false when the function being analyzed is a non-variadic
function.

llvm-svn: 174442
This commit is contained in:
Akira Hatanaka 2013-02-05 21:18:11 +00:00
parent 09867f6b42
commit df9480569b
2 changed files with 15 additions and 1 deletions
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2
lib/Target/Mips/MipsISelLowering.cpp
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@ -3793,7 +3793,7 @@ MipsTargetLowering::MipsCC::MipsCC(CallingConv::ID CallConv, bool IsVarArg,
IntArgRegs = Mips64IntRegs;
ShadowRegs = Mips64DPRegs;
FixedFn = CC_MipsN;
VarFn = CC_MipsN_VarArg;
VarFn = IsVarArg ? CC_MipsN_VarArg : CC_MipsN;
}
if (CallConv == CallingConv::Fast) {

14
test/CodeGen/Mips/mips64-expand-libcall.ll Normal file
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@ -0,0 +1,14 @@
; RUN: llc -march=mips64el -mcpu=mips64r2 -O3 < %s | FileCheck %s
; Check that %add is not passed in an integer register.
;
; CHECK-NOT: dmfc1 $4
define double @callfloor(double %d) nounwind readnone {
entry:
%add = fadd double %d, 1.000000e+00
%call = tail call double @floor(double %add) nounwind readnone
ret double %call
}
declare double @floor(double) nounwind readnone