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llvm-mirror/test/CodeGen/X86/2010-01-08-Atomic64Bug.ll
Michael Liao 5bf5c77881 Fix PR14314
- Fix operand order for atomic sub, where the minuend is the value
  loaded from memory and the subtrahend is the parameter specified.

llvm-svn: 167718
2012-11-12 06:49:17 +00:00

23 lines
585 B
LLVM

; RUN: llc < %s -mtriple=i386-apple-darwin -mcpu=corei7 | FileCheck %s
; rdar://r7512579
; PHI defs in the atomic loop should be used by the add / adc
; instructions. They should not be dead.
define void @t(i64* nocapture %p) nounwind ssp {
entry:
; CHECK: t:
; CHECK: movl ([[REG:%[a-z]+]]), %eax
; CHECK: movl 4([[REG]]), %edx
; CHECK: LBB0_1:
; CHECK: movl %eax, %ebx
; CHECK: addl {{%[a-z]+}}, %ebx
; CHECK: movl %edx, %ecx
; CHECK: adcl {{%[a-z]+}}, %ecx
; CHECK: lock
; CHECK-NEXT: cmpxchg8b ([[REG]])
; CHECK-NEXT: jne
%0 = atomicrmw add i64* %p, i64 1 seq_cst
ret void
}