Fix a latent bug exposed by my truncstore patch. We compiled stfiwx-2.ll to:
_test:
fctiwz f0, f1
stfiwx f0, 0, r4
blr
instead of:
_test:
fctiwz f0, f1
stfd f0, -8(r1)
nop
nop
lwz r2, -4(r1)
stb r2, 0(r4)
blr
The former is not correct (stores 4 bytes, not 1).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46161 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 6a35baf..32feb05 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -3184,6 +3184,7 @@
case ISD::STORE:
// Turn STORE (FP_TO_SINT F) -> STFIWX(FCTIWZ(F)).
if (TM.getSubtarget<PPCSubtarget>().hasSTFIWX() &&
+ !cast<StoreSDNode>(N)->isTruncatingStore() &&
N->getOperand(1).getOpcode() == ISD::FP_TO_SINT &&
N->getOperand(1).getValueType() == MVT::i32 &&
N->getOperand(1).getOperand(0).getValueType() != MVT::ppcf128) {