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
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
// RUN: %clang_cc1 -triple x86_64-pc-linux -emit-llvm %s -o - | FileCheck %s
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extern void foo_alias (void) __asm ("foo");
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inline void foo (void) {
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return foo_alias ();
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}
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extern int abs_alias (int) __asm ("abs");
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inline __attribute__ ((__always_inline__)) int abs (int x) {
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return abs_alias(x);
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}
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extern char *strrchr_foo (const char *__s, int __c) __asm ("strrchr");
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extern inline __attribute__ ((__always_inline__)) __attribute__ ((__gnu_inline__)) char * strrchr_foo (const char *__s, int __c) {
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return __builtin_strrchr (__s, __c);
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}
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extern inline void __attribute__((always_inline, __gnu_inline__))
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prefetch(void) {
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__builtin_prefetch(0, 0, 1);
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}
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extern inline __attribute__((__always_inline__, __gnu_inline__)) void *memchr(void *__s, int __c, __SIZE_TYPE__ __n) {
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return __builtin_memchr(__s, __c, __n);
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}
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void f(void) {
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foo();
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abs(0);
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strrchr_foo("", '.');
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prefetch();
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memchr("", '.', 0);
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}
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// CHECK-LABEL: define{{.*}} void @f()
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// CHECK: call void @foo()
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// CHECK: call i32 @abs(i32 noundef 0)
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// CHECK: call i8* @strrchr(
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// CHECK: call void @llvm.prefetch.p0i8(
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// CHECK: call i8* @memchr(
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// CHECK: ret void
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// CHECK: declare void @foo()
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// CHECK: declare i32 @abs(i32
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// CHECK: declare i8* @strrchr(i8* noundef, i32 noundef)
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// CHECK: declare i8* @memchr(
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// CHECK: declare void @llvm.prefetch.p0i8(
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