049993eae6
Prior to this patch, differing metadata operands to two otherwise identical instructions was not enough to consider the instructions different in the eyes of the function comparator. This breaks LLVM virtual function elimination, among other features. In this patch, we handle the case where two associated operands are MDStrings of different value. This patch does not differentiate more complex metadata operands. --------- Co-authored-by: Nuri Amari <nuriamari@fb.com>
45 lines
2.0 KiB
LLVM
45 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
|
|
; RUN: opt -passes=mergefunc -S %s | FileCheck %s
|
|
|
|
; This test contains three identical functions, aside from the metadata
|
|
; they pass to a function call. This test verifies that the function merger
|
|
; pass is able to merge the two functions that are truly identical,
|
|
; but the third that passes different metadata is preserved
|
|
|
|
declare { ptr, i1 } @llvm.type.checked.load(ptr, i32, metadata)
|
|
|
|
define i1 @merge_candidate_a(ptr %ptr, i32 %offset) {
|
|
; CHECK-LABEL: define i1 @merge_candidate_a(
|
|
; CHECK-SAME: ptr [[PTR:%.*]], i32 [[OFFSET:%.*]]) {
|
|
; CHECK-NEXT: [[TMP1:%.*]] = call { ptr, i1 } @llvm.type.checked.load(ptr [[PTR]], i32 [[OFFSET]], metadata !"common_metadata")
|
|
; CHECK-NEXT: [[TMP2:%.*]] = extractvalue { ptr, i1 } [[TMP1]], 1
|
|
; CHECK-NEXT: ret i1 [[TMP2]]
|
|
;
|
|
%1 = call { ptr, i1 } @llvm.type.checked.load(ptr %ptr, i32 %offset, metadata !"common_metadata")
|
|
%2 = extractvalue { ptr, i1 } %1, 1
|
|
ret i1 %2
|
|
}
|
|
|
|
define i1 @merge_candidate_c(ptr %ptr, i32 %offset) {
|
|
; CHECK-LABEL: define i1 @merge_candidate_c(
|
|
; CHECK-SAME: ptr [[PTR:%.*]], i32 [[OFFSET:%.*]]) {
|
|
; CHECK-NEXT: [[TMP1:%.*]] = call { ptr, i1 } @llvm.type.checked.load(ptr [[PTR]], i32 [[OFFSET]], metadata !"different_metadata")
|
|
; CHECK-NEXT: [[TMP2:%.*]] = extractvalue { ptr, i1 } [[TMP1]], 1
|
|
; CHECK-NEXT: ret i1 [[TMP2]]
|
|
;
|
|
%1 = call { ptr, i1 } @llvm.type.checked.load(ptr %ptr, i32 %offset, metadata !"different_metadata")
|
|
%2 = extractvalue { ptr, i1 } %1, 1
|
|
ret i1 %2
|
|
}
|
|
|
|
define i1 @merge_candidate_b(ptr %ptr, i32 %offset) {
|
|
; CHECK-LABEL: define i1 @merge_candidate_b(
|
|
; CHECK-SAME: ptr [[TMP0:%.*]], i32 [[TMP1:%.*]]) {
|
|
; CHECK-NEXT: [[TMP3:%.*]] = tail call i1 @merge_candidate_a(ptr [[TMP0]], i32 [[TMP1]])
|
|
; CHECK-NEXT: ret i1 [[TMP3]]
|
|
;
|
|
%1 = call { ptr, i1 } @llvm.type.checked.load(ptr %ptr, i32 %offset, metadata !"common_metadata")
|
|
%2 = extractvalue { ptr, i1 } %1, 1
|
|
ret i1 %2
|
|
}
|