1 ; RUN: opt < %s -loop-reduce -S | FileCheck %s 2 3 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 4 target triple = "x86_64-apple-macosx10.9.0" 5 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. 9 10 ; CHECK: [[TMP:%[a-z]+]] = trunc i32 {{.*}} to i8 11 ; CHECK: {{%[a-z0-9]+}} = sext i8 [[TMP]] to i32 12 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 23 24 ; Function Attrs: nounwind optsize ssp uwtable 25 define i32 @main() #0 { 26 entry: 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 34 br label %for.body 35 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 40 41 land.rhs.i: ; preds = %for.body 42 store i32 0, i32* @c, align 4 43 br label %fn3.exit 44 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 49 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 59 ret i32 0 60 } 61 62 ; Function Attrs: nounwind optsize 63 declare i32 @printf(i8* nocapture readonly, ...) #1 64 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 } 68
