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[NFC][PhaseOrdering] Add test for the lack of CSE after SimplifyCFG (PR51092)

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Roman Lebedev 2021-07-14 21:54:04 +03:00
parent 5da5b28644
commit c64b97d8cf
1 changed files with 54 additions and 0 deletions
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54
test/Transforms/PhaseOrdering/X86/earlycse-after-simplifycfg-two-entry-phi-node-folding.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -O3 -S -enable-new-pm=0 < %s | FileCheck %s --check-prefixes=ALL,OLDPM
; RUN: opt -passes='default<O3>' -S < %s | FileCheck %s --check-prefixes=ALL,NEWPM
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define dso_local void @foo(i32* %in, i64 %lo, i64 %hi, i32 %ishi) #0 {
; ALL-LABEL: @foo(
; ALL-NEXT: entry:
; ALL-NEXT: [[TOBOOL_NOT:%.*]] = icmp eq i32 [[ISHI:%.*]], 0
; ALL-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i32, i32* [[IN:%.*]], i64 [[LO:%.*]]
; ALL-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[IN]], i64 [[HI:%.*]]
; ALL-NEXT: [[ARRAYIDX1_SINK1:%.*]] = select i1 [[TOBOOL_NOT]], i32* [[ARRAYIDX1]], i32* [[ARRAYIDX]]
; ALL-NEXT: [[ARRAYIDX1_SINK:%.*]] = select i1 [[TOBOOL_NOT]], i32* [[ARRAYIDX1]], i32* [[ARRAYIDX]]
; ALL-NEXT: [[ARRAYVAL2:%.*]] = load i32, i32* [[ARRAYIDX1_SINK1]], align 4
; ALL-NEXT: [[INC2:%.*]] = add nsw i32 [[ARRAYVAL2]], 1
; ALL-NEXT: store i32 [[INC2]], i32* [[ARRAYIDX1_SINK]], align 4
; ALL-NEXT: ret void
;
entry:
%in.addr = alloca i32*, align 8
%lo.addr = alloca i64, align 8
%hi.addr = alloca i64, align 8
%ishi.addr = alloca i32, align 4
store i32* %in, i32** %in.addr, align 8
store i64 %lo, i64* %lo.addr, align 8
store i64 %hi, i64* %hi.addr, align 8
store i32 %ishi, i32* %ishi.addr, align 4
%ishi.reloaded = load i32, i32* %ishi.addr, align 4
%tobool = icmp ne i32 %ishi.reloaded, 0
br i1 %tobool, label %if.then, label %if.else
if.then:
%in.reloaded = load i32*, i32** %in.addr, align 8
%hi.reloaded = load i64, i64* %hi.addr, align 8
%arrayidx = getelementptr inbounds i32, i32* %in.reloaded, i64 %hi.reloaded
%arrayval = load i32, i32* %arrayidx, align 4
%inc = add nsw i32 %arrayval, 1
store i32 %inc, i32* %arrayidx, align 4
br label %if.end
if.else:
%in.reloaded2 = load i32*, i32** %in.addr, align 8
%lo.reloaded = load i64, i64* %lo.addr, align 8
%arrayidx1 = getelementptr inbounds i32, i32* %in.reloaded2, i64 %lo.reloaded
%arrayval2 = load i32, i32* %arrayidx1, align 4
%inc2 = add nsw i32 %arrayval2, 1
store i32 %inc2, i32* %arrayidx1, align 4
br label %if.end
if.end:
ret void
}