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
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
; RUN: opt -S < %s -instcombine -inline -jump-threading -loop-unroll -unroll-count=4 | FileCheck %s
;
; This is a test case that required a number of setup passes because
; it depends on block order.
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-macosx10.6.8"
declare i1 @check() nounwind
declare i32 @getval() nounwind
; Check that the loop exit merges values from all the iterations. This
; could be a tad fragile, but it's a good test.
;
; CHECK-LABEL: @foo(
; CHECK: return:
; CHECK: %retval.0 = phi i32 [ %tmp7.i, %land.lhs.true ], [ 0, %do.cond ], [ %tmp7.i.1, %land.lhs.true.1 ], [ 0, %do.cond.1 ], [ %tmp7.i.2, %land.lhs.true.2 ], [ 0, %do.cond.2 ], [ %tmp7.i.3, %land.lhs.true.3 ], [ 0, %do.cond.3 ]
; CHECK-NOT: @bar(
; CHECK: bar.exit.3
define i32 @foo() uwtable ssp align 2 {
entry:
br i1 undef, label %return, label %if.end
if.end: ; preds = %entry
%call2 = call i32 @getval()
br label %do.body
do.body: ; preds = %do.cond, %if.end
%call6 = call i32 @bar()
%cmp = icmp ne i32 %call6, 0
br i1 %cmp, label %land.lhs.true, label %do.cond
land.lhs.true: ; preds = %do.body
%call10 = call i32 @getval()
%cmp11 = icmp eq i32 0, %call10
br i1 %cmp11, label %return, label %do.cond
do.cond: ; preds = %land.lhs.true, %do.body
%cmp18 = icmp sle i32 0, %call2
br i1 %cmp18, label %do.body, label %return
return: ; preds = %do.cond, %land.lhs.true, %entry
%retval.0 = phi i32 [ 0, %entry ], [ %call6, %land.lhs.true ], [ 0, %do.cond ]
ret i32 %retval.0
}
define linkonce_odr i32 @bar() nounwind uwtable ssp align 2 {
entry:
br i1 undef, label %land.lhs.true, label %cond.end
land.lhs.true: ; preds = %entry
%cmp4 = call zeroext i1 @check()
br i1 %cmp4, label %cond.true, label %cond.end
cond.true: ; preds = %land.lhs.true
%tmp7 = call i32 @getval()
br label %cond.end
cond.end: ; preds = %cond.true, %land.lhs.true, %entry
%cond = phi i32 [ %tmp7, %cond.true ], [ 0, %land.lhs.true ], [ 0, %entry ]
ret i32 %cond
}
|
