blob: 5e352415c747c62aa2aec9f4c139f150c3dd741f (
plain)
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
31
32
|
; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "e-m:e-i64:64-n8:16:32:64"
; Although i1 is not in the datalayout, we should treat it
; as a legal type because it is a fundamental type in IR.
; This means we should shrink the phi (sink the zexts).
define i64 @sink_i1_casts(i1 %cond1, i1 %cond2) {
; CHECK-LABEL: @sink_i1_casts(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 %cond1, label %if, label %end
; CHECK: if:
; CHECK-NEXT: br label %end
; CHECK: end:
; CHECK-NEXT: [[PHI_IN:%.*]] = phi i1 [ %cond1, %entry ], [ %cond2, %if ]
; CHECK-NEXT: [[PHI:%.*]] = zext i1 [[PHI_IN]] to i64
; CHECK-NEXT: ret i64 [[PHI]]
;
entry:
%z1 = zext i1 %cond1 to i64
br i1 %cond1, label %if, label %end
if:
%z2 = zext i1 %cond2 to i64
br label %end
end:
%phi = phi i64 [ %z1, %entry ], [ %z2, %if ]
ret i64 %phi
}
|
