diff options
| -rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 2 | ||||
| -rw-r--r-- | test/CodeGen/ARM/atomic-cmp.ll | 17 |
2 files changed, 18 insertions, 1 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index 59a71553bf..4afc8c7fac 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -4344,7 +4344,7 @@ ARMTargetLowering::EmitAtomicCmpSwap(MachineInstr *MI, default: llvm_unreachable("unsupported size for AtomicCmpSwap!"); case 1: ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB; - strOpc = isThumb2 ? ARM::t2LDREXB : ARM::STREXB; + strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB; break; case 2: ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH; diff --git a/test/CodeGen/ARM/atomic-cmp.ll b/test/CodeGen/ARM/atomic-cmp.ll new file mode 100644 index 0000000000..f31aa7bc58 --- /dev/null +++ b/test/CodeGen/ARM/atomic-cmp.ll @@ -0,0 +1,17 @@ +; RUN: llc < %s -mtriple=armv7-apple-darwin | FileCheck %s -check-prefix=ARM +; RUN: llc < %s -mtriple=thumbv7-apple-darwin | FileCheck %s -check-prefix=T2 +; rdar://8964854 + +define i8 @t(i8* %a, i8 %b, i8 %c) nounwind { +; ARM: t: +; ARM: ldrexb +; ARM: strexb + +; T2: t: +; T2: ldrexb +; T2: strexb + %tmp0 = tail call i8 @llvm.atomic.cmp.swap.i8.p0i8(i8* %a, i8 %b, i8 %c) + ret i8 %tmp0 +} + +declare i8 @llvm.atomic.cmp.swap.i8.p0i8(i8* nocapture, i8, i8) nounwind |