1 ; RUN: opt < %s -loop-reduce -S | FileCheck %s
3 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
4 target triple = "x86_64-apple-macosx10.9.0"
6 ; LSR shouldn't normalize IV if it can't be denormalized to the original
7 ; expression. In this testcase, the normalized expression was denormalized to
8 ; an expression different from the original, and we were losing sign extension.
10 ; CHECK: [[TMP:%[a-z]+]] = trunc i32 {{.*}} to i8
11 ; CHECK: {{%[a-z0-9]+}} = sext i8 [[TMP]] to i32
13 @j = common global i32 0, align 4
14 @c = common global i32 0, align 4
15 @g = common global i32 0, align 4
16 @h = common global i8 0, align 1
17 @d = common global i32 0, align 4
18 @i = common global i32 0, align 4
19 @e = common global i32 0, align 4
20 @.str = private unnamed_addr constant [4 x i8] c"%x\0A\00", align 1
21 @a = common global i32 0, align 4
22 @b = common global i16 0, align 2
24 ; Function Attrs: nounwind optsize ssp uwtable
25 define i32 @main() #0 {
27 store i8 0, i8* @h, align 1
28 %0 = load i32, i32* @j, align 4
29 %tobool.i = icmp eq i32 %0, 0
30 %1 = load i32, i32* @d, align 4
31 %cmp3 = icmp sgt i32 %1, -1
32 %.lobit = lshr i32 %1, 31
33 %.lobit.not = xor i32 %.lobit, 1
36 for.body: ; preds = %entry, %fn3.exit
37 %inc9 = phi i8 [ 0, %entry ], [ %inc, %fn3.exit ]
38 %conv = sext i8 %inc9 to i32
39 br i1 %tobool.i, label %fn3.exit, label %land.rhs.i
41 land.rhs.i: ; preds = %for.body
42 store i32 0, i32* @c, align 4
45 fn3.exit: ; preds = %for.body, %land.rhs.i
46 %inc = add i8 %inc9, 1
47 %cmp = icmp sgt i8 %inc, -1
48 br i1 %cmp, label %for.body, label %for.end
50 for.end: ; preds = %fn3.exit
51 %.lobit.not. = select i1 %cmp3, i32 %.lobit.not, i32 0
52 store i32 %conv, i32* @g, align 4
53 store i32 %.lobit.not., i32* @i, align 4
54 store i8 %inc, i8* @h, align 1
55 %conv7 = sext i8 %inc to i32
56 %add = add nsw i32 %conv7, %conv
57 store i32 %add, i32* @e, align 4
58 %call = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %add) #2
62 ; Function Attrs: nounwind optsize
63 declare i32 @printf(i8* nocapture readonly, ...) #1
65 attributes #0 = { nounwind optsize ssp uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
66 attributes #1 = { nounwind optsize "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
67 attributes #2 = { nounwind optsize }