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- ; 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, ...)
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