llvm.org GIT mirror llvm / 9e24ab7 test / CodeGen / PowerPC / atomic-1.ll
9e24ab7

Tree @9e24ab7 (Download .tar.gz)

atomic-1.ll @9e24ab7raw · history · blame

; RUN: llc < %s -mtriple=powerpc-apple-darwin -march=ppc32 |  FileCheck %s

define i32 @exchange_and_add(i32* %mem, i32 %val) nounwind {
; CHECK-LABEL: exchange_and_add:
; CHECK: lwarx {{r[0-9]+}}, 0, {{r[0-9]+}}
  %tmp = atomicrmw add i32* %mem, i32 %val monotonic
; CHECK: stwcx. {{r[0-9]+}}, 0, {{r[0-9]+}}
  ret i32 %tmp
}

define i32 @exchange_and_cmp(i32* %mem) nounwind {
; CHECK-LABEL: exchange_and_cmp:
; CHECK: lwarx
  %tmppair = cmpxchg i32* %mem, i32 0, i32 1 monotonic monotonic
  %tmp = extractvalue { i32, i1 } %tmppair, 0
; CHECK: stwcx.
; CHECK: stwcx.
  ret i32 %tmp
}

define i32 @exchange(i32* %mem, i32 %val) nounwind {
; CHECK-LABEL: exchange:
; CHECK: lwarx
  %tmp = atomicrmw xchg i32* %mem, i32 1 monotonic
; CHECK: stwcx.
  ret i32 %tmp
}