view test/CodeGen/X86/cmov-into-branch.ll @ 33:e4204d083e25

LLVM 3.5
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 14:32:10 +0900
parents 95c75e76d11b
children afa8332a0e37
line wrap: on
line source

; RUN: llc -march=x86-64 -mcpu=core2 < %s | FileCheck %s

; cmp with single-use load, should not form cmov.
define i32 @test1(double %a, double* nocapture %b, i32 %x, i32 %y)  {
  %load = load double* %b, align 8
  %cmp = fcmp olt double %load, %a
  %cond = select i1 %cmp, i32 %x, i32 %y
  ret i32 %cond
; CHECK-LABEL: test1:
; CHECK: ucomisd
; CHECK-NOT: cmov
; CHECK: j
; CHECK-NOT: cmov
}

; Sanity check: no load.
define i32 @test2(double %a, double %b, i32 %x, i32 %y)  {
  %cmp = fcmp ogt double %a, %b
  %cond = select i1 %cmp, i32 %x, i32 %y
  ret i32 %cond
; CHECK-LABEL: test2:
; CHECK: ucomisd
; CHECK: cmov
}

; Multiple uses of %a, should not form cmov.
define i32 @test3(i32 %a, i32* nocapture %b, i32 %x)  {
  %load = load i32* %b, align 4
  %cmp = icmp ult i32 %load, %a
  %cond = select i1 %cmp, i32 %a, i32 %x
  ret i32 %cond
; CHECK-LABEL: test3:
; CHECK: cmpl
; CHECK-NOT: cmov
; CHECK: j
; CHECK-NOT: cmov
}

; Multiple uses of the load.
define i32 @test4(i32 %a, i32* nocapture %b, i32 %x, i32 %y)  {
  %load = load i32* %b, align 4
  %cmp = icmp ult i32 %load, %a
  %cond = select i1 %cmp, i32 %x, i32 %y
  %add = add i32 %cond, %load
  ret i32 %add
; CHECK-LABEL: test4:
; CHECK: cmpl
; CHECK: cmov
}

; Multiple uses of the cmp.
define i32 @test5(i32 %a, i32* nocapture %b, i32 %x, i32 %y) {
  %load = load i32* %b, align 4
  %cmp = icmp ult i32 %load, %a
  %cmp1 = icmp ugt i32 %load, %a
  %cond = select i1 %cmp1, i32 %a, i32 %y
  %cond5 = select i1 %cmp, i32 %cond, i32 %x
  ret i32 %cond5
; CHECK-LABEL: test5:
; CHECK: cmpl
; CHECK: cmov
; CHECK: cmov
}