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Reland r342494 after fixing LIT checks.

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llvm-svn: 342907
This commit is contained in:
Christy Lee 2018-09-24 17:26:30 +00:00
parent ab07822de8
commit 610002d619
1 changed files with 60 additions and 0 deletions
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60
test/Transforms/MergeICmps/X86/alias-merge-blocks.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -mtriple=x86_64-unknown-unknown -mergeicmps -S | FileCheck %s --check-prefix=X86
%"struct.std::pair" = type { i32, i32, i32, i32 }
; Before patch D51550
define zeroext i1 @opeq1(
; X86-LABEL: @opeq1(
; X86-NEXT: entry:
; X86-NEXT: [[PTR:%.*]] = alloca i32
; X86-NEXT: [[FIRST_I:%.*]] = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* [[A:%.*]], i64 0, i32 0
; X86-NEXT: [[TMP0:%.*]] = load i32, i32* [[FIRST_I]], align 4
; X86-NEXT: [[FIRST1_I:%.*]] = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* [[B:%.*]], i64 0, i32 0
; X86-NEXT: [[TMP1:%.*]] = load i32, i32* [[FIRST1_I]], align 4
; X86-NEXT: store i32 42, i32* [[PTR]]
; X86-NEXT: [[CMP_I:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
; X86-NEXT: br i1 [[CMP_I]], label [[LAND_RHS_I:%.*]], label [[OPEQ1_EXIT:%.*]]
%"struct.std::pair"* nocapture readonly dereferenceable(16) %a,
%"struct.std::pair"* nocapture readonly dereferenceable(16) %b) local_unnamed_addr #0 {
entry:
%ptr = alloca i32
%first.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 0
%0 = load i32, i32* %first.i, align 4
%first1.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 0
%1 = load i32, i32* %first1.i, align 4
; Does other work, has no interference, merge block
store i32 42, i32* %ptr
%cmp.i = icmp eq i32 %0, %1
br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit
land.rhs.i:
%second.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 1
%2 = load i32, i32* %second.i, align 4
%second2.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 1
%3 = load i32, i32* %second2.i, align 4
%cmp2.i = icmp eq i32 %2, %3
br i1 %cmp2.i, label %land.rhs.i.2, label %opeq1.exit
land.rhs.i.2:
%third.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 2
%4 = load i32, i32* %third.i, align 4
%third2.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 2
%5 = load i32, i32* %third2.i, align 4
%cmp3.i = icmp eq i32 %4, %5
br i1 %cmp3.i, label %land.rhs.i.3, label %opeq1.exit
land.rhs.i.3:
%fourth.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 3
%6 = load i32, i32* %fourth.i, align 4
%fourth2.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 3
%7 = load i32, i32* %fourth2.i, align 4
%cmp4.i = icmp eq i32 %6, %7
br label %opeq1.exit
opeq1.exit:
%8 = phi i1 [ false, %entry ], [ false, %land.rhs.i] , [ false, %land.rhs.i.2 ], [ %cmp4.i, %land.rhs.i.3 ]
ret i1 %8
}