forked from OSchip/llvm-project
40 lines
1.1 KiB
LLVM
40 lines
1.1 KiB
LLVM
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; RUN: opt -S -loop-vectorize -force-vector-width=2 -force-vector-unroll=1 -mcpu=prescott < %s | FileCheck %s
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S128"
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target triple = "i386-unknown-freebsd11.0"
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@big = external global [0 x i32]
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; PR18049
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; We need to truncate the exit count to i32. This is legal because the
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; arithmetic is signed (%inc is nsw).
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; CHECK-LABEL: tripcount
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; CHECK: trunc i64 %count to i32
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define void @tripcount(i64 %count) {
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entry:
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%cmp6 = icmp sgt i64 %count, 0
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br i1 %cmp6, label %for.body.preheader, label %for.end
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for.body.preheader:
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br label %for.body
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for.body:
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%i.07 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
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%arrayidx = getelementptr inbounds [0 x i32]* @big, i32 0, i32 %i.07
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%0 = load i32* %arrayidx, align 4
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%neg = xor i32 %0, -1
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store i32 %neg, i32* %arrayidx, align 4
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%inc = add nsw i32 %i.07, 1
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%conv = sext i32 %inc to i64
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%cmp = icmp slt i64 %conv, %count
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br i1 %cmp, label %for.body, label %for.end.loopexit
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for.end.loopexit:
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br label %for.end
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for.end:
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ret void
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}
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