2020-06-27 11:41:37 +08:00
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; RUN: opt -basic-aa -loop-idiom < %s -S | FileCheck %s
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2019-04-17 12:52:47 +08:00
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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; CHECK: @.memset_pattern = private unnamed_addr constant [4 x i32] [i32 2, i32 2, i32 2, i32 2], align 16
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target triple = "x86_64-apple-darwin10.0.0"
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;void test(int *f, unsigned n) {
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; for (unsigned i = 0; i < 2 * n; i += 2) {
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; f[i] = 0;
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; f[i+1] = 0;
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; }
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;}
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define void @test(i32* %f, i32 %n) nounwind ssp {
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entry:
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%mul = shl i32 %n, 1
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%cmp1 = icmp eq i32 %mul, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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%0 = zext i32 %mul to i64
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %f, i64 %indvars.iv
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store i32 0, i32* %arrayidx, align 4
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%1 = or i64 %indvars.iv, 1
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%arrayidx2 = getelementptr inbounds i32, i32* %f, i64 %1
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store i32 0, i32* %arrayidx2, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
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%cmp = icmp ult i64 %indvars.iv.next, %0
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br i1 %cmp, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @test(
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; CHECK: call void @llvm.memset
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; CHECK-NOT: store
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}
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;void test_pattern(int *f, unsigned n) {
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; for (unsigned i = 0; i < 2 * n; i += 2) {
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; f[i] = 2;
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; f[i+1] = 2;
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; }
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;}
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define void @test_pattern(i32* %f, i32 %n) nounwind ssp {
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entry:
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%mul = shl i32 %n, 1
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%cmp1 = icmp eq i32 %mul, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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%0 = zext i32 %mul to i64
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %f, i64 %indvars.iv
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store i32 2, i32* %arrayidx, align 4
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%1 = or i64 %indvars.iv, 1
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%arrayidx2 = getelementptr inbounds i32, i32* %f, i64 %1
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store i32 2, i32* %arrayidx2, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
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%cmp = icmp ult i64 %indvars.iv.next, %0
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br i1 %cmp, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @test_pattern(
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; CHECK: call void @memset_pattern16
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; CHECK-NOT: store
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}
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