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
|
; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep phi | count 1
; This should only result in one PHI node!
; void foo(double *D, double *E, double F) {
; while (D != E)
; *D++ = F;
; }
define void @foo(double* %D, double* %E, double %F) {
entry:
%tmp.24 = icmp eq double* %D, %E ; <i1> [#uses=1]
br i1 %tmp.24, label %return, label %no_exit
no_exit: ; preds = %no_exit, %entry
%indvar = phi i32 [ 0, %entry ], [ %indvar.next, %no_exit ] ; <i32> [#uses=2]
%D_addr.0.0.rec = bitcast i32 %indvar to i32 ; <i32> [#uses=2]
%D_addr.0.0 = getelementptr double* %D, i32 %D_addr.0.0.rec ; <double*> [#uses=1]
%inc.rec = add i32 %D_addr.0.0.rec, 1 ; <i32> [#uses=1]
%inc = getelementptr double* %D, i32 %inc.rec ; <double*> [#uses=1]
store double %F, double* %D_addr.0.0
%tmp.2 = icmp eq double* %inc, %E ; <i1> [#uses=1]
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
br i1 %tmp.2, label %return, label %no_exit
return: ; preds = %no_exit, %entry
ret void
}
|
