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Diffstat (limited to 'lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp')
-rw-r--r--lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp20
1 files changed, 14 insertions, 6 deletions
diff --git a/lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp b/lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp
index 5e477d39e074..a1c98251cec4 100644
--- a/lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp
+++ b/lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp
@@ -718,13 +718,21 @@ bool AArch64ExpandPseudo::expandCMP_SWAP_128(
.addReg(DestLo.getReg(), getKillRegState(DestLo.isDead()))
.addOperand(DesiredLo)
.addImm(0);
- BuildMI(LoadCmpBB, DL, TII->get(AArch64::SBCSXr), AArch64::XZR)
+ BuildMI(LoadCmpBB, DL, TII->get(AArch64::CSINCWr), StatusReg)
+ .addReg(AArch64::WZR)
+ .addReg(AArch64::WZR)
+ .addImm(AArch64CC::EQ);
+ BuildMI(LoadCmpBB, DL, TII->get(AArch64::SUBSXrs), AArch64::XZR)
.addReg(DestHi.getReg(), getKillRegState(DestHi.isDead()))
- .addOperand(DesiredHi);
- BuildMI(LoadCmpBB, DL, TII->get(AArch64::Bcc))
- .addImm(AArch64CC::NE)
- .addMBB(DoneBB)
- .addReg(AArch64::NZCV, RegState::Implicit | RegState::Kill);
+ .addOperand(DesiredHi)
+ .addImm(0);
+ BuildMI(LoadCmpBB, DL, TII->get(AArch64::CSINCWr), StatusReg)
+ .addReg(StatusReg, RegState::Kill)
+ .addReg(StatusReg, RegState::Kill)
+ .addImm(AArch64CC::EQ);
+ BuildMI(LoadCmpBB, DL, TII->get(AArch64::CBNZW))
+ .addReg(StatusReg, RegState::Kill)
+ .addMBB(DoneBB);
LoadCmpBB->addSuccessor(DoneBB);
LoadCmpBB->addSuccessor(StoreBB);