75 lines
2.8 KiB
LLVM
75 lines
2.8 KiB
LLVM
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; RUN: llc -verify-machineinstrs -mcpu=pwr8 -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
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; This code causes an assertion failure if dereferenceable flag is not properly set in the load generated for memcpy
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; CHECK-LABEL: @func
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; CHECK: lxvd2x [[VREG:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}
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; CHECK-NOT: lxvd2x
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; CHECK: stxvd2x [[VREG:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}
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; CHECK: stxvd2x [[VREG:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}
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; CHECK: blr
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define void @func(i1 %flag) {
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entry:
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%pairs = alloca [4 x <2 x i64>], align 8
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%pair1 = getelementptr inbounds [4 x <2 x i64>], [4 x <2 x i64>]* %pairs, i64 0, i64 1
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%pair2 = getelementptr inbounds [4 x <2 x i64>], [4 x <2 x i64>]* %pairs, i64 0, i64 2
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%pvec1 = bitcast <2 x i64>* %pair1 to <2 x i64>*
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%pvec2 = bitcast <2 x i64>* %pair2 to <2 x i64>*
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%dst = bitcast [4 x <2 x i64>]* %pairs to i8*
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%src = bitcast <2 x i64>* %pair2 to i8*
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br i1 %flag, label %end, label %dummy
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end:
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; copy third element into first element by memcpy
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 nonnull %dst, i8* align 8 %src, i64 16, i1 false)
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; copy third element into second element by LD/ST
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%vec2 = load <2 x i64>, <2 x i64>* %pvec2, align 8
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store <2 x i64> %vec2, <2 x i64>* %pvec1, align 8
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ret void
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dummy:
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; to make use of %src in another BB
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %src, i8* %src, i64 0, i1 false)
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br label %end
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}
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; CHECK-LABEL: @func2
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; CHECK: lxvd2x [[VREG:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}
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; CHECK-NOT: lxvd2x
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; CHECK: stxvd2x [[VREG:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}
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; CHECK: stxvd2x [[VREG:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}
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; CHECK: blr
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define void @func2(i1 %flag) {
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entry:
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%pairs = alloca [4 x <2 x i64>], align 8
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%pair1 = getelementptr inbounds [4 x <2 x i64>], [4 x <2 x i64>]* %pairs, i64 0, i64 1
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%pair2 = getelementptr inbounds [4 x <2 x i64>], [4 x <2 x i64>]* %pairs, i64 0, i64 2
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%pvec1 = bitcast <2 x i64>* %pair1 to <2 x i64>*
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%pvec2 = bitcast <2 x i64>* %pair2 to <2 x i64>*
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%dst = bitcast [4 x <2 x i64>]* %pairs to i8*
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%src = bitcast <2 x i64>* %pair2 to i8*
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br i1 %flag, label %end, label %dummy
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end:
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; copy third element into first element by memcpy
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call void @llvm.memmove.p0i8.p0i8.i64(i8* align 8 nonnull %dst, i8* align 8 %src, i64 16, i1 false)
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; copy third element into second element by LD/ST
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%vec2 = load <2 x i64>, <2 x i64>* %pvec2, align 8
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store <2 x i64> %vec2, <2 x i64>* %pvec1, align 8
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ret void
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dummy:
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; to make use of %src in another BB
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %src, i8* %src, i64 0, i1 false)
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br label %end
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}
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; Function Attrs: argmemonly nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1) #1
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declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1) #1
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attributes #1 = { argmemonly nounwind }
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