159f1c048e
Current implementation uses `std::copy` to shift all incoming values after the removed index. This patch optimizes `PHINode::removeIncomingValue()` by replacing the linear shift of incoming values with a swap-with-last strategy. After this change, the relative order of incoming values after removal is not preserved. This improves compile-time for PHI nodes with many predecessors. Depends: https://github.com/llvm/llvm-project/pull/171955 https://github.com/llvm/llvm-project/pull/171956 https://github.com/llvm/llvm-project/pull/171960 https://github.com/llvm/llvm-project/pull/171962
49 lines
1.3 KiB
LLVM
49 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
|
|
; RUN: opt -S -passes="default<O3>" < %s | FileCheck %s
|
|
|
|
define i8 @test_switch_with_sext_phi(i8 %code) {
|
|
; CHECK-LABEL: define noundef i8 @test_switch_with_sext_phi(
|
|
; CHECK-SAME: i8 [[CODE:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: switch i8 [[CODE]], label [[SW_EPILOG:%.*]] [
|
|
; CHECK-NEXT: i8 108, label [[SW_BB2:%.*]]
|
|
; CHECK-NEXT: i8 76, label [[SW_BB3:%.*]]
|
|
; CHECK-NEXT: ]
|
|
; CHECK: sw.bb2:
|
|
; CHECK-NEXT: br label [[SW_EPILOG]]
|
|
; CHECK: sw.bb3:
|
|
; CHECK-NEXT: br label [[SW_EPILOG]]
|
|
; CHECK: sw.epilog:
|
|
; CHECK-NEXT: [[PEP_CODE:%.*]] = phi i8 [ 113, [[SW_BB2]] ], [ [[CODE]], [[ENTRY:%.*]] ], [ 81, [[SW_BB3]] ]
|
|
; CHECK-NEXT: ret i8 [[PEP_CODE]]
|
|
;
|
|
entry:
|
|
%conv = sext i8 %code to i32
|
|
switch i32 %conv, label %sw.default [
|
|
i32 105, label %sw.epilog
|
|
i32 73, label %sw.bb1
|
|
i32 108, label %sw.bb2
|
|
i32 76, label %sw.bb3
|
|
i32 63, label %sw.bb4
|
|
]
|
|
|
|
sw.bb1:
|
|
br label %sw.epilog
|
|
|
|
sw.bb2:
|
|
br label %sw.epilog
|
|
|
|
sw.bb3:
|
|
br label %sw.epilog
|
|
|
|
sw.bb4:
|
|
br label %sw.epilog
|
|
|
|
sw.default:
|
|
br label %sw.epilog
|
|
|
|
sw.epilog:
|
|
%pep_code = phi i8 [ %code, %sw.default ], [ 63, %sw.bb4 ], [ 81, %sw.bb3 ], [ 113, %sw.bb2 ], [ 73, %sw.bb1 ], [ 105, %entry ]
|
|
ret i8 %pep_code
|
|
}
|