1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
; RUN: opt -S < %s -gvn-sink | FileCheck %s
declare void @llvm.sideeffect()
; GVN sinking across a @llvm.sideeffect.
; CHECK-LABEL: scalarsSinking
; CHECK-NOT: fmul
; CHECK: = phi
; CHECK: = fmul
define float @scalarsSinking(float %d, float %m, float %a, i1 %cmp) {
entry:
br i1 %cmp, label %if.then, label %if.else
if.then:
call void @llvm.sideeffect()
%sub = fsub float %m, %a
%mul0 = fmul float %sub, %d
br label %if.end
if.else:
%add = fadd float %m, %a
%mul1 = fmul float %add, %d
br label %if.end
if.end:
%phi = phi float [ %mul0, %if.then ], [ %mul1, %if.else ]
ret float %phi
}
|
