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llvm-mirror/test/CodeGen/X86/atomic-pointer.ll
Michael Liao 5859ab0234 Fix PR15355
- Clear 'mayStore' flag when loading from the atomic variable before the
  spin loop
- Clear kill flag from one use to multiple use in registers forming the
  address to that atomic variable
- don't use a physical register as live-in register in BB (neither entry
  nor landing pad.) by copying it into virtual register

(patch by Cameron Zwarich)

llvm-svn: 176538
2013-03-06 00:17:04 +00:00

23 lines
476 B
LLVM

; RUN: llc < %s -mtriple=i686-none-linux -verify-machineinstrs | FileCheck %s
define i32* @test_atomic_ptr_load(i32** %a0) {
; CHECK: test_atomic_ptr_load
; CHECK: movl
; CHECK: movl
; CHECK: ret
0:
%0 = load atomic i32** %a0 seq_cst, align 4
ret i32* %0
}
define void @test_atomic_ptr_store(i32* %a0, i32** %a1) {
; CHECK: test_atomic_ptr_store
; CHECK: movl
; CHECK: movl
; CHECK: xchgl
; CHECK: ret
0:
store atomic i32* %a0, i32** %a1 seq_cst, align 4
ret void
}