derek.holloway
7502bf64a4
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134 lines
6.7 KiB
C
134 lines
6.7 KiB
C
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
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// RUN: %clang_cc1 -triple x86_64 -emit-llvm -o - %s | FileCheck %s
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//
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// Verifies that clang detects memcpy inline version and uses it instead of the builtin.
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// Checks alternate version with the `artificial` attribute.
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typedef unsigned long size_t;
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// Clang requires these attributes for a function to be redefined.
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#define AVAILABLE_EXTERNALLY extern inline __attribute__((always_inline)) __attribute__((gnu_inline))
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#define AVAILABLE_EXTERNALLY_ALTERNATE extern inline __attribute__((__always_inline__)) __attribute__((__artificial__))
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// Clang recognizes an inline builtin and renames it to prevent conflict with builtins.
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AVAILABLE_EXTERNALLY void *memcpy(void *a, const void *b, size_t c) {
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asm("# memcpy.inline marker");
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return __builtin_memcpy(a, b, c);
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}
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// Clang recognizes an inline builtin and renames it to prevent conflict with builtins.
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AVAILABLE_EXTERNALLY_ALTERNATE void *memmove(void *a, const void *b, size_t c) {
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asm("# memmove.inline marker");
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return __builtin_memmove(a, b, c);
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}
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// CHECK-LABEL: @foo(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[A_ADDR_I:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[B_ADDR_I:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[C_ADDR_I:%.*]] = alloca i64, align 8
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// CHECK-NEXT: [[A_ADDR:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[B_ADDR:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[C_ADDR:%.*]] = alloca i64, align 8
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// CHECK-NEXT: store ptr [[A:%.*]], ptr [[A_ADDR]], align 8
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// CHECK-NEXT: store ptr [[B:%.*]], ptr [[B_ADDR]], align 8
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// CHECK-NEXT: store i64 [[C:%.*]], ptr [[C_ADDR]], align 8
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[A_ADDR]], align 8
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// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[B_ADDR]], align 8
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// CHECK-NEXT: [[TMP2:%.*]] = load i64, ptr [[C_ADDR]], align 8
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// CHECK-NEXT: store ptr [[TMP0]], ptr [[A_ADDR_I]], align 8
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// CHECK-NEXT: store ptr [[TMP1]], ptr [[B_ADDR_I]], align 8
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// CHECK-NEXT: store i64 [[TMP2]], ptr [[C_ADDR_I]], align 8
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// CHECK-NEXT: call void asm sideeffect "# memcpy.inline marker", "~{dirflag},~{fpsr},~{flags}"() #[[ATTR3:[0-9]+]], !srcloc [[META2:![0-9]+]]
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// CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[A_ADDR_I]], align 8
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// CHECK-NEXT: [[TMP4:%.*]] = load ptr, ptr [[B_ADDR_I]], align 8
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// CHECK-NEXT: [[TMP5:%.*]] = load i64, ptr [[C_ADDR_I]], align 8
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 [[TMP3]], ptr align 1 [[TMP4]], i64 [[TMP5]], i1 false)
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// CHECK-NEXT: ret ptr [[TMP3]]
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//
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void *foo(void *a, const void *b, size_t c) {
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return memcpy(a, b, c);
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}
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// CHECK-LABEL: @foo_alt(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[A_ADDR_I:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[B_ADDR_I:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[C_ADDR_I:%.*]] = alloca i64, align 8
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// CHECK-NEXT: [[A_ADDR:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[B_ADDR:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[C_ADDR:%.*]] = alloca i64, align 8
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// CHECK-NEXT: store ptr [[A:%.*]], ptr [[A_ADDR]], align 8
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// CHECK-NEXT: store ptr [[B:%.*]], ptr [[B_ADDR]], align 8
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// CHECK-NEXT: store i64 [[C:%.*]], ptr [[C_ADDR]], align 8
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[A_ADDR]], align 8
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// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[B_ADDR]], align 8
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// CHECK-NEXT: [[TMP2:%.*]] = load i64, ptr [[C_ADDR]], align 8
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// CHECK-NEXT: store ptr [[TMP0]], ptr [[A_ADDR_I]], align 8
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// CHECK-NEXT: store ptr [[TMP1]], ptr [[B_ADDR_I]], align 8
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// CHECK-NEXT: store i64 [[TMP2]], ptr [[C_ADDR_I]], align 8
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// CHECK-NEXT: call void asm sideeffect "# memmove.inline marker", "~{dirflag},~{fpsr},~{flags}"() #[[ATTR3]], !srcloc [[META3:![0-9]+]]
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// CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[A_ADDR_I]], align 8
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// CHECK-NEXT: [[TMP4:%.*]] = load ptr, ptr [[B_ADDR_I]], align 8
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// CHECK-NEXT: [[TMP5:%.*]] = load i64, ptr [[C_ADDR_I]], align 8
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// CHECK-NEXT: call void @llvm.memmove.p0.p0.i64(ptr align 1 [[TMP3]], ptr align 1 [[TMP4]], i64 [[TMP5]], i1 false)
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// CHECK-NEXT: ret ptr [[TMP3]]
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//
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void *foo_alt(void *a, const void *b, size_t c) {
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return memmove(a, b, c);
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}
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// CHECK-LABEL: @bar(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[A_ADDR:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[B_ADDR:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[C_ADDR:%.*]] = alloca i64, align 8
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// CHECK-NEXT: [[CPY:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: store ptr [[A:%.*]], ptr [[A_ADDR]], align 8
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// CHECK-NEXT: store ptr [[B:%.*]], ptr [[B_ADDR]], align 8
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// CHECK-NEXT: store i64 [[C:%.*]], ptr [[C_ADDR]], align 8
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// CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr [[C_ADDR]], align 8
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// CHECK-NEXT: [[CMP:%.*]] = icmp ugt i64 [[TMP0]], 10
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// CHECK-NEXT: [[TMP1:%.*]] = zext i1 [[CMP]] to i64
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// CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], ptr @memcpy, ptr @foo
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// CHECK-NEXT: store ptr [[COND]], ptr [[CPY]], align 8
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// CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[CPY]], align 8
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// CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[A_ADDR]], align 8
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// CHECK-NEXT: [[TMP4:%.*]] = load ptr, ptr [[B_ADDR]], align 8
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// CHECK-NEXT: [[TMP5:%.*]] = load i64, ptr [[C_ADDR]], align 8
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// CHECK-NEXT: [[CALL:%.*]] = call ptr [[TMP2]](ptr noundef [[TMP3]], ptr noundef [[TMP4]], i64 noundef [[TMP5]])
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// CHECK-NEXT: ret void
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//
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void bar(void *a, const void *b, size_t c) {
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void *(*cpy)(void *, const void *, size_t) = c > 10 ? memcpy : foo;
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cpy(a, b, c);
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}
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// CHECK-LABEL: @bar_alt(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[A_ADDR:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[B_ADDR:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[C_ADDR:%.*]] = alloca i64, align 8
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// CHECK-NEXT: [[CPY:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: store ptr [[A:%.*]], ptr [[A_ADDR]], align 8
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// CHECK-NEXT: store ptr [[B:%.*]], ptr [[B_ADDR]], align 8
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// CHECK-NEXT: store i64 [[C:%.*]], ptr [[C_ADDR]], align 8
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// CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr [[C_ADDR]], align 8
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// CHECK-NEXT: [[CMP:%.*]] = icmp ugt i64 [[TMP0]], 10
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// CHECK-NEXT: [[TMP1:%.*]] = zext i1 [[CMP]] to i64
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// CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], ptr @memmove, ptr @foo_alt
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// CHECK-NEXT: store ptr [[COND]], ptr [[CPY]], align 8
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// CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[CPY]], align 8
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// CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[A_ADDR]], align 8
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// CHECK-NEXT: [[TMP4:%.*]] = load ptr, ptr [[B_ADDR]], align 8
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// CHECK-NEXT: [[TMP5:%.*]] = load i64, ptr [[C_ADDR]], align 8
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// CHECK-NEXT: [[CALL:%.*]] = call ptr [[TMP2]](ptr noundef [[TMP3]], ptr noundef [[TMP4]], i64 noundef [[TMP5]])
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// CHECK-NEXT: ret void
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//
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void bar_alt(void *a, const void *b, size_t c) {
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void *(*cpy)(void *, const void *, size_t) = c > 10 ? memmove : foo_alt;
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cpy(a, b, c);
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}
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