49 lines
1.9 KiB
LLVM
49 lines
1.9 KiB
LLVM
; RUN: opt -S -loop-reroll %s | FileCheck %s
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target triple = "aarch64--linux-gnu"
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@buf = global [16 x i8] c"\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A", align 1
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define i32 @test1(i32 %len, i8* nocapture readonly %buf) #0 {
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entry:
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%cmp.13 = icmp sgt i32 %len, 1
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br i1 %cmp.13, label %while.body.lr.ph, label %while.end
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while.body.lr.ph: ; preds = %entry
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br label %while.body
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while.body:
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;CHECK-LABEL: while.body:
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;CHECK-NEXT: %indvar = phi i32 [ %indvar.next, %while.body ], [ 0, %while.body.lr.ph ]
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;CHECK-NEXT: %sum4.015 = phi i64 [ 0, %while.body.lr.ph ], [ %add, %while.body ]
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;CHECK-NOT: %sub5 = add nsw i32 %len.addr.014, -1
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;CHECK-NOT: %sub5 = add nsw i32 %len.addr.014, -2
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;CHECK: br i1 %exitcond, label %while.cond.while.end_crit_edge, label %while.body
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%sum4.015 = phi i64 [ 0, %while.body.lr.ph ], [ %add4, %while.body ]
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%len.addr.014 = phi i32 [ %len, %while.body.lr.ph ], [ %sub5, %while.body ]
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%idxprom = sext i32 %len.addr.014 to i64
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%arrayidx = getelementptr inbounds i8, i8* %buf, i64 %idxprom
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%0 = load i8, i8* %arrayidx, align 1
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%conv = zext i8 %0 to i64
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%add = add i64 %conv, %sum4.015
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%sub = add nsw i32 %len.addr.014, -1
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%idxprom1 = sext i32 %sub to i64
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%arrayidx2 = getelementptr inbounds i8, i8* %buf, i64 %idxprom1
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%1 = load i8, i8* %arrayidx2, align 1
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%conv3 = zext i8 %1 to i64
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%add4 = add i64 %add, %conv3
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%sub5 = add nsw i32 %len.addr.014, -2
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%cmp = icmp sgt i32 %sub5, 1
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br i1 %cmp, label %while.body, label %while.cond.while.end_crit_edge
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while.cond.while.end_crit_edge: ; preds = %while.body
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%add4.lcssa = phi i64 [ %add4, %while.body ]
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%phitmp = trunc i64 %add4.lcssa to i32
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br label %while.end
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while.end: ; preds = %while.cond.while.end_crit_edge, %entry
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%sum4.0.lcssa = phi i32 [ %phitmp, %while.cond.while.end_crit_edge ], [ 0, %entry ]
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ret i32 %sum4.0.lcssa
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unreachable
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}
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