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llvm-mirror/test/CodeGen/X86/atomic-load-store-wide.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

20 lines
447 B
LLVM

; RUN: llc < %s -march=x86 -verify-machineinstrs | FileCheck %s
; 64-bit load/store on x86-32
; FIXME: The generated code can be substantially improved.
define void @test1(i64* %ptr, i64 %val1) {
; CHECK: test1
; CHECK: cmpxchg8b
; CHECK-NEXT: jne
store atomic i64 %val1, i64* %ptr seq_cst, align 8
ret void
}
define i64 @test2(i64* %ptr) {
; CHECK: test2
; CHECK: cmpxchg8b
%val = load atomic i64* %ptr seq_cst, align 8
ret i64 %val
}