| ; RUN: opt -loop-reduce -S < %s | FileCheck %s |
| ; PR18000 |
| |
| target datalayout = "e-i64:64-f80:128-s:64-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @a = global i32 0, align 4 |
| @b = common global i32 0, align 4 |
| @e = common global i8 0, align 1 |
| @d = common global i32 0, align 4 |
| @c = common global i32 0, align 4 |
| @.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1 |
| |
| ; Function Attrs: nounwind optsize uwtable |
| ; CHECK-LABEL: foo |
| define i32 @foo() { |
| entry: |
| %.pr = load i32, i32* @b, align 4 |
| %cmp10 = icmp slt i32 %.pr, 1 |
| br i1 %cmp10, label %for.cond1.preheader.lr.ph, label %entry.for.end9_crit_edge |
| |
| entry.for.end9_crit_edge: ; preds = %entry |
| %.pre = load i32, i32* @c, align 4 |
| br label %for.end9 |
| |
| for.cond1.preheader.lr.ph: ; preds = %entry |
| %0 = load i32, i32* @a, align 4 |
| %tobool = icmp eq i32 %0, 0 |
| br i1 %tobool, label %for.cond1.preheader.for.cond1.preheader.split_crit_edge, label %return.loopexit.split |
| |
| for.cond1.preheader.for.cond1.preheader.split_crit_edge: ; preds = %for.cond1.preheader.lr.ph, %for.inc8 |
| %1 = phi i32 [ %inc, %for.inc8 ], [ %.pr, %for.cond1.preheader.lr.ph ] |
| br label %if.end |
| |
| ; CHECK-LABEL: if.end |
| if.end: ; preds = %if.end, %for.cond1.preheader.for.cond1.preheader.split_crit_edge |
| |
| ; CHECK: %lsr.iv = phi i32 [ %lsr.iv.next, %if.end ], [ 258, %for.cond1.preheader.for.cond1.preheader.split_crit_edge ] |
| %indvars.iv = phi i32 [ 1, %for.cond1.preheader.for.cond1.preheader.split_crit_edge ], [ %indvars.iv.next, %if.end ] |
| |
| %2 = phi i8 [ 1, %for.cond1.preheader.for.cond1.preheader.split_crit_edge ], [ %dec, %if.end ] |
| %conv7 = mul i32 %indvars.iv, 258 |
| %shl = and i32 %conv7, 510 |
| store i32 %shl, i32* @c, align 4 |
| |
| ; CHECK: %lsr.iv.next = add nsw i32 %lsr.iv, -258 |
| %dec = add i8 %2, -1 |
| |
| %cmp2 = icmp sgt i8 %dec, -1 |
| %indvars.iv.next = add i32 %indvars.iv, -1 |
| br i1 %cmp2, label %if.end, label %for.inc8 |
| |
| for.inc8: ; preds = %if.end |
| store i32 0, i32* @d, align 4 |
| %inc = add nsw i32 %1, 1 |
| store i32 %inc, i32* @b, align 4 |
| %cmp = icmp slt i32 %1, 0 |
| br i1 %cmp, label %for.cond1.preheader.for.cond1.preheader.split_crit_edge, label %for.cond.for.end9_crit_edge |
| |
| for.cond.for.end9_crit_edge: ; preds = %for.inc8 |
| store i8 %dec, i8* @e, align 1 |
| br label %for.end9 |
| |
| for.end9: ; preds = %entry.for.end9_crit_edge, %for.cond.for.end9_crit_edge |
| %3 = phi i32 [ %.pre, %entry.for.end9_crit_edge ], [ %shl, %for.cond.for.end9_crit_edge ] |
| %call = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %3) #2 |
| br label %return |
| |
| return.loopexit.split: ; preds = %for.cond1.preheader.lr.ph |
| store i8 1, i8* @e, align 1 |
| store i32 0, i32* @d, align 4 |
| br label %return |
| |
| return: ; preds = %return.loopexit.split, %for.end9 |
| %retval.0 = phi i32 [ 0, %for.end9 ], [ 1, %return.loopexit.split ] |
| ret i32 %retval.0 |
| } |
| |
| ; Function Attrs: nounwind optsize |
| declare i32 @printf(i8* nocapture readonly, ...) |
| |
