bfb9b8e075
We call tail-call-elim near the beginning of the pipeline, but that is too early to annotate calls that get added later. In the motivating case from issue #47852, the missing 'tail' on memset leads to sub-optimal codegen. I experimented with removing the early instance of tail-call-elim instead of just adding another pass, but that appears to be slightly worse for compile-time: +0.15% vs. +0.08% time. "tailcall" shows adding the pass; "tailcall2" shows moving the pass to later, then adding the original early pass back (so 1596886802 is functionally equivalent to 180b0439dc ): https://llvm-compile-time-tracker.com/index.php?config=NewPM-O3&stat=instructions&remote=rotateright Note that there was an effort to split the tail call functionality into 2 passes - that could help reduce compile-time if we find that this change costs more in compile-time than expected based on the preliminary testing: D60031 Differential Revision: https://reviews.llvm.org/D130374
121 lines
5.1 KiB
C
121 lines
5.1 KiB
C
// RUN: %clang_cc1 -no-opaque-pointers < %s -triple armv5e-none-linux-gnueabi -emit-llvm -O1 | FileCheck %s
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// FIXME: This file should not be checking -O1 output.
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// Ie, it is testing many IR optimizer passes as part of front-end verification.
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enum memory_order {
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memory_order_relaxed, memory_order_consume, memory_order_acquire,
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memory_order_release, memory_order_acq_rel, memory_order_seq_cst
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};
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int *test_c11_atomic_fetch_add_int_ptr(_Atomic(int *) *p) {
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// CHECK: test_c11_atomic_fetch_add_int_ptr
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// CHECK: {{%[^ ]*}} = tail call i32 @__atomic_fetch_add_4(i8* noundef {{%[0-9]+}}, i32 noundef 12, i32 noundef 5)
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return __c11_atomic_fetch_add(p, 3, memory_order_seq_cst);
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}
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int *test_c11_atomic_fetch_sub_int_ptr(_Atomic(int *) *p) {
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// CHECK: test_c11_atomic_fetch_sub_int_ptr
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// CHECK: {{%[^ ]*}} = tail call i32 @__atomic_fetch_sub_4(i8* noundef {{%[0-9]+}}, i32 noundef 20, i32 noundef 5)
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return __c11_atomic_fetch_sub(p, 5, memory_order_seq_cst);
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}
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int test_c11_atomic_fetch_add_int(_Atomic(int) *p) {
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// CHECK: test_c11_atomic_fetch_add_int
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// CHECK: {{%[^ ]*}} = tail call i32 @__atomic_fetch_add_4(i8* noundef {{%[0-9]+}}, i32 noundef 3, i32 noundef 5)
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return __c11_atomic_fetch_add(p, 3, memory_order_seq_cst);
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}
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int test_c11_atomic_fetch_sub_int(_Atomic(int) *p) {
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// CHECK: test_c11_atomic_fetch_sub_int
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// CHECK: {{%[^ ]*}} = tail call i32 @__atomic_fetch_sub_4(i8* noundef {{%[0-9]+}}, i32 noundef 5, i32 noundef 5)
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return __c11_atomic_fetch_sub(p, 5, memory_order_seq_cst);
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}
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int *fp2a(int **p) {
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// CHECK: @fp2a
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// CHECK: {{%[^ ]*}} = tail call i32 @__atomic_fetch_sub_4(i8* noundef {{%[0-9]+}}, i32 noundef 4, i32 noundef 0)
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// Note, the GNU builtins do not multiply by sizeof(T)!
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return __atomic_fetch_sub(p, 4, memory_order_relaxed);
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}
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int test_atomic_fetch_add(int *p) {
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// CHECK: test_atomic_fetch_add
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// CHECK: {{%[^ ]*}} = tail call i32 @__atomic_fetch_add_4(i8* noundef {{%[0-9]+}}, i32 noundef 55, i32 noundef 5)
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return __atomic_fetch_add(p, 55, memory_order_seq_cst);
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}
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int test_atomic_fetch_sub(int *p) {
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// CHECK: test_atomic_fetch_sub
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// CHECK: {{%[^ ]*}} = tail call i32 @__atomic_fetch_sub_4(i8* noundef {{%[0-9]+}}, i32 noundef 55, i32 noundef 5)
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return __atomic_fetch_sub(p, 55, memory_order_seq_cst);
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}
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int test_atomic_fetch_and(int *p) {
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// CHECK: test_atomic_fetch_and
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// CHECK: {{%[^ ]*}} = tail call i32 @__atomic_fetch_and_4(i8* noundef {{%[0-9]+}}, i32 noundef 55, i32 noundef 5)
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return __atomic_fetch_and(p, 55, memory_order_seq_cst);
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}
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int test_atomic_fetch_or(int *p) {
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// CHECK: test_atomic_fetch_or
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// CHECK: {{%[^ ]*}} = tail call i32 @__atomic_fetch_or_4(i8* noundef {{%[0-9]+}}, i32 noundef 55, i32 noundef 5)
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return __atomic_fetch_or(p, 55, memory_order_seq_cst);
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}
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int test_atomic_fetch_xor(int *p) {
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// CHECK: test_atomic_fetch_xor
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// CHECK: {{%[^ ]*}} = tail call i32 @__atomic_fetch_xor_4(i8* noundef {{%[0-9]+}}, i32 noundef 55, i32 noundef 5)
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return __atomic_fetch_xor(p, 55, memory_order_seq_cst);
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}
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int test_atomic_fetch_nand(int *p) {
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// CHECK: test_atomic_fetch_nand
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// CHECK: {{%[^ ]*}} = tail call i32 @__atomic_fetch_nand_4(i8* noundef {{%[0-9]+}}, i32 noundef 55, i32 noundef 5)
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return __atomic_fetch_nand(p, 55, memory_order_seq_cst);
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}
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int test_atomic_add_fetch(int *p) {
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// CHECK: test_atomic_add_fetch
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// CHECK: [[CALL:%[^ ]*]] = tail call i32 @__atomic_fetch_add_4(i8* noundef {{%[0-9]+}}, i32 noundef 55, i32 noundef 5)
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// CHECK: {{%[^ ]*}} = add i32 [[CALL]], 55
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return __atomic_add_fetch(p, 55, memory_order_seq_cst);
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}
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int test_atomic_sub_fetch(int *p) {
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// CHECK: test_atomic_sub_fetch
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// CHECK: [[CALL:%[^ ]*]] = tail call i32 @__atomic_fetch_sub_4(i8* noundef {{%[0-9]+}}, i32 noundef 55, i32 noundef 5)
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// CHECK: {{%[^ ]*}} = add i32 [[CALL]], -55
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return __atomic_sub_fetch(p, 55, memory_order_seq_cst);
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}
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int test_atomic_and_fetch(int *p) {
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// CHECK: test_atomic_and_fetch
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// CHECK: [[CALL:%[^ ]*]] = tail call i32 @__atomic_fetch_and_4(i8* noundef {{%[0-9]+}}, i32 noundef 55, i32 noundef 5)
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// CHECK: {{%[^ ]*}} = and i32 [[CALL]], 55
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return __atomic_and_fetch(p, 55, memory_order_seq_cst);
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}
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int test_atomic_or_fetch(int *p) {
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// CHECK: test_atomic_or_fetch
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// CHECK: [[CALL:%[^ ]*]] = tail call i32 @__atomic_fetch_or_4(i8* noundef {{%[0-9]+}}, i32 noundef 55, i32 noundef 5)
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// CHECK: {{%[^ ]*}} = or i32 [[CALL]], 55
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return __atomic_or_fetch(p, 55, memory_order_seq_cst);
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}
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int test_atomic_xor_fetch(int *p) {
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// CHECK: test_atomic_xor_fetch
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// CHECK: [[CALL:%[^ ]*]] = tail call i32 @__atomic_fetch_xor_4(i8* noundef {{%[0-9]+}}, i32 noundef 55, i32 noundef 5)
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// CHECK: {{%[^ ]*}} = xor i32 [[CALL]], 55
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return __atomic_xor_fetch(p, 55, memory_order_seq_cst);
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}
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int test_atomic_nand_fetch(int *p) {
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// CHECK: test_atomic_nand_fetch
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// CHECK: [[CALL:%[^ ]*]] = tail call i32 @__atomic_fetch_nand_4(i8* noundef {{%[0-9]+}}, i32 noundef 55, i32 noundef 5)
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// FIXME: We should not be checking optimized IR. It changes independently of clang.
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// FIXME-CHECK: [[AND:%[^ ]*]] = and i32 [[CALL]], 55
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// FIXME-CHECK: {{%[^ ]*}} = xor i32 [[AND]], -1
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return __atomic_nand_fetch(p, 55, memory_order_seq_cst);
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}
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