49 lines
1.6 KiB
LLVM
49 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind
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; Same src/dest.
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define void @test1(i8* %a) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: ret void
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;
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tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i1 false)
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ret void
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}
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; PR8267 - same src/dest, but volatile.
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define void @test2(i8* %a) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[A:%.*]], i8* [[A]], i32 100, i1 true)
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; CHECK-NEXT: ret void
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;
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tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i1 true)
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ret void
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}
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; 17179869184 == 0x400000000 - make sure that doesn't get truncated to 32-bit.
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define void @test3(i8* %d, i8* %s) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 4 dereferenceable(17179869184) [[D:%.*]], i8* noundef nonnull align 4 dereferenceable(17179869184) [[S:%.*]], i64 17179869184, i1 false)
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; CHECK-NEXT: ret void
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;
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %d, i8* align 4 %s, i64 17179869184, i1 false)
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ret void
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}
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@UnknownConstant = external constant i128
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define void @memcpy_to_constant(i8* %src) {
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; CHECK-LABEL: @memcpy_to_constant(
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; CHECK-NEXT: ret void
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;
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%dest = bitcast i128* @UnknownConstant to i8*
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 16, i1 false)
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ret void
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}
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