llvm/test/CodeGen/X86/licm-dominance.ll
Devang Patel 2e35047947 Add dominance check for the instruction being hoisted.
For example, MachineLICM should not hoist a load that is not guaranteed to be executed.
Radar 10254254.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141689 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-11 18:09:58 +00:00

37 lines
1.2 KiB
LLVM

; RUN: llc -asm-verbose=false < %s | FileCheck %s
; MachineLICM should check dominance before hoisting instructions.
; CHECK: jne LBB0_3
; CHECK-NEXT: xorb %al, %al
; CHECK-NEXT: testb %al, %al
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-apple-macosx10.7.2"
define void @CMSColorWorldCreateParametricData() nounwind uwtable optsize ssp {
entry:
br label %for.body.i
for.body.i:
br i1 undef, label %for.inc.i, label %if.then26.i
if.then26.i:
br i1 undef, label %if.else.i.i, label %lor.lhs.false.i.i
if.else.i.i:
br i1 undef, label %lor.lhs.false.i.i, label %if.then116.i.i
lor.lhs.false.i.i:
br i1 undef, label %for.inc.i, label %if.then116.i.i
if.then116.i.i:
unreachable
for.inc.i:
%cmp17.i = icmp ult i64 undef, undef
br i1 %cmp17.i, label %for.body.i, label %if.end28.i
if.end28.i:
ret void
}