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[mips][fastisel] Consider soft-float an unsupported floating point mode

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Treat soft-float as unsupported for fast-isel. Additionally, ensure we check
that lowering f32 arguments also considers the case of soft-float mode.

Reviewers: ehostunreach, vkalintiris, zoran.jovanovic

Differential Review: https://reviews.llvm.org/D24505


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283209 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Simon Dardis 2016-10-04 10:35:07 +00:00
parent cd988cd581
commit c072c50d24
2 changed files with 17 additions and 2 deletions
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8
lib/Target/Mips/MipsFastISel.cpp
View File

@ -216,7 +216,7 @@ public:
!Subtarget->inMicroMipsMode() && Subtarget->hasMips32();
TargetSupported =
ISASupported && TM.isPositionIndependent() && getABI().IsO32();
UnsupportedFPMode = Subtarget->isFP64bit();
UnsupportedFPMode = Subtarget->isFP64bit() || Subtarget->useSoftFloat();
}
unsigned fastMaterializeAlloca(const AllocaInst *AI) override;
@ -1365,6 +1365,10 @@ bool MipsFastISel::fastLowerArguments() {
break;
case MVT::f32:
if (UnsupportedFPMode) {
DEBUG(dbgs() << ".. .. gave up (UnsupportedFPMode)\n");
return false;
}
if (NextFGR32 == FGR32ArgRegs.end()) {
DEBUG(dbgs() << ".. .. gave up (ran out of FGR32 arguments)\n");
return false;
@ -1381,7 +1385,7 @@ bool MipsFastISel::fastLowerArguments() {
case MVT::f64:
if (UnsupportedFPMode) {
DEBUG(dbgs() << ".. .. gave up (UnsupportedFPMode\n");
DEBUG(dbgs() << ".. .. gave up (UnsupportedFPMode)\n");
return false;
}
if (NextAFGR64 == AFGR64ArgRegs.end()) {

11
test/CodeGen/Mips/Fast-ISel/fast-isel-softfloat-lower-args.ll Normal file
View File

@ -0,0 +1,11 @@
; RUN: not llc -march=mipsel -mcpu=mips32r2 -mattr=+soft-float \
; RUN: -O0 -fast-isel-abort=3 -relocation-model=pic < %s
; Test that FastISel aborts instead of trying to lower arguments for soft-float.
define void @__signbit(double %__x) {
entry:
%__x.addr = alloca double, align 8
store double %__x, double* %__x.addr, align 8
ret void
}