1b1c8d83d3
Turning on `enable_noundef_analysis` flag allows better codegen by removing freeze instructions. I modified clang by renaming `enable_noundef_analysis` flag to `disable-noundef-analysis` and turning it off by default. Test updates are made as a separate patch: D108453 Reviewed By: eugenis Differential Revision: https://reviews.llvm.org/D105169
27 lines
1.3 KiB
C
27 lines
1.3 KiB
C
// REQUIRES: x86-registered-target
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// RUN: %clang_cc1 -triple x86_64-unknown-linux -emit-llvm %s -o - | FileCheck %s
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// CHECK-LABEL: define{{.*}} void @test_memcpy_inline_0(i8* noundef %dst, i8* noundef %src)
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void test_memcpy_inline_0(void *dst, const void *src) {
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// CHECK: call void @llvm.memcpy.inline.p0i8.p0i8.i64(i8* align 1 %0, i8* align 1 %1, i64 0, i1 false)
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__builtin_memcpy_inline(dst, src, 0);
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}
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// CHECK-LABEL: define{{.*}} void @test_memcpy_inline_1(i8* noundef %dst, i8* noundef %src)
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void test_memcpy_inline_1(void *dst, const void *src) {
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// CHECK: call void @llvm.memcpy.inline.p0i8.p0i8.i64(i8* align 1 %0, i8* align 1 %1, i64 1, i1 false)
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__builtin_memcpy_inline(dst, src, 1);
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}
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// CHECK-LABEL: define{{.*}} void @test_memcpy_inline_4(i8* noundef %dst, i8* noundef %src)
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void test_memcpy_inline_4(void *dst, const void *src) {
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// CHECK: call void @llvm.memcpy.inline.p0i8.p0i8.i64(i8* align 1 %0, i8* align 1 %1, i64 4, i1 false)
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__builtin_memcpy_inline(dst, src, 4);
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}
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// CHECK-LABEL: define{{.*}} void @test_memcpy_inline_aligned_buffers(i64* noundef %dst, i64* noundef %src)
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void test_memcpy_inline_aligned_buffers(unsigned long long *dst, const unsigned long long *src) {
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// CHECK: call void @llvm.memcpy.inline.p0i8.p0i8.i64(i8* align 8 %2, i8* align 8 %3, i64 4, i1 false)
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__builtin_memcpy_inline(dst, src, 4);
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}
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