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
41 lines
1.5 KiB
LLVM
41 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; This is currently failing because of bug in LoopSimplifyCFG. It does not update
|
|
; duplicating Phi inputs properly.
|
|
; REQUIRES: asserts
|
|
; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -passes='require<domtree>,loop(loop-simplifycfg)' -debug-only=loop-simplifycfg -verify-loop-info -verify-dom-info -verify-loop-lcssa 2>&1 < %s | FileCheck %s
|
|
; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -passes=loop-simplifycfg -verify-memoryssa -debug-only=loop-simplifycfg -verify-loop-info -verify-dom-info -verify-loop-lcssa 2>&1 < %s | FileCheck %s
|
|
|
|
target datalayout = "P40"
|
|
|
|
@a = external global i16, align 1
|
|
|
|
define void @f1(i1 %cond) {
|
|
; CHECK-LABEL: @f1(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[FOR_COND:%.*]]
|
|
; CHECK: for.cond:
|
|
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_THEN:%.*]], label [[FOR_INC:%.*]]
|
|
; CHECK: if.then:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = load i16, ptr @a, align 1
|
|
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i16 [[TMP0]], 0
|
|
; CHECK-NEXT: br label [[FOR_INC]]
|
|
; CHECK: for.inc:
|
|
; CHECK-NEXT: [[C_1:%.*]] = phi i16 [ 1, [[FOR_COND]] ], [ 2, [[IF_THEN]] ]
|
|
; CHECK-NEXT: br label [[FOR_COND]]
|
|
;
|
|
entry:
|
|
br label %for.cond
|
|
|
|
for.cond:
|
|
br i1 %cond, label %if.then, label %for.inc
|
|
|
|
if.then:
|
|
%0 = load i16, ptr @a, align 1
|
|
%tobool = icmp ne i16 %0, 0
|
|
br i1 %tobool, label %for.inc, label %for.inc
|
|
|
|
for.inc:
|
|
%c.1 = phi i16 [ 2, %if.then ], [ 2, %if.then ], [ 1, %for.cond ]
|
|
br label %for.cond
|
|
}
|