mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-31 16:02:52 +01:00
45 lines
1.1 KiB
LLVM
45 lines
1.1 KiB
LLVM
; RUN: opt < %s -gvn -S | FileCheck %s
|
|
|
|
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32"
|
|
|
|
@p = external global i32
|
|
|
|
define i32 @test(i32 %n) nounwind {
|
|
; CHECK: @test
|
|
entry:
|
|
br label %for.cond
|
|
|
|
; loads aligned greater than the memory should not be moved past conditionals
|
|
; CHECK-NOT: load
|
|
; CHECK: br i1
|
|
|
|
for.cond:
|
|
%i.0 = phi i32 [ 0, %entry ], [ %indvar.next, %for.inc ]
|
|
%cmp = icmp slt i32 %i.0, %n
|
|
br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
|
|
|
|
for.cond.for.end_crit_edge:
|
|
; ...but PRE can still move the load out of for.end to here.
|
|
; CHECK: for.cond.for.end_crit_edge:
|
|
; CHECK-NEXT: load
|
|
br label %for.end
|
|
|
|
for.body:
|
|
%tmp3 = load i32* @p, align 8
|
|
%dec = add i32 %tmp3, -1
|
|
store i32 %dec, i32* @p
|
|
%cmp6 = icmp slt i32 %dec, 0
|
|
br i1 %cmp6, label %for.body.for.end_crit_edge, label %for.inc
|
|
|
|
for.body.for.end_crit_edge:
|
|
br label %for.end
|
|
|
|
for.inc:
|
|
%indvar.next = add i32 %i.0, 1
|
|
br label %for.cond
|
|
|
|
for.end:
|
|
%tmp9 = load i32* @p, align 8
|
|
ret i32 %tmp9
|
|
}
|