From 10003e31f47cb8a542e3d13b0fb5f56902e38854 Mon Sep 17 00:00:00 2001
From: Clement Courbet <courbet@google.com>
Date: Wed, 7 Feb 2018 09:58:55 +0000
Subject: [MergeICmps] Re-commit rL324317 "Enable the MergeICmps Pass by
 default."

With fixes from rL324341.

Original commit message:

[MergeICmps] Enable the MergeICmps Pass by default.

Summary: Now that PR33325 is fixed, this should always improve the generated code.

Reviewers: spatel

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D42793

llvm-svn: 324465
---
 llvm/test/CodeGen/X86/memcmp-mergeexpand.ll | 29 +++++++----------------------
 1 file changed, 7 insertions(+), 22 deletions(-)

(limited to 'llvm/test/CodeGen/X86/memcmp-mergeexpand.ll')

diff --git a/llvm/test/CodeGen/X86/memcmp-mergeexpand.ll b/llvm/test/CodeGen/X86/memcmp-mergeexpand.ll
index 1b928d6f967..1c470177c27 100644
--- a/llvm/test/CodeGen/X86/memcmp-mergeexpand.ll
+++ b/llvm/test/CodeGen/X86/memcmp-mergeexpand.ll
@@ -8,37 +8,22 @@
 
 define zeroext i1 @opeq1(
 ; X86-LABEL: opeq1:
-; X86:       # %bb.0: # %entry
+; X86:       # %bb.0: # %opeq1.exit
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %edx
-; X86-NEXT:    cmpl (%eax), %edx
-; X86-NEXT:    jne .LBB0_1
-; X86-NEXT:  # %bb.2: # %land.rhs.i
 ; X86-NEXT:    movl 4(%ecx), %ecx
-; X86-NEXT:    cmpl 4(%eax), %ecx
+; X86-NEXT:    xorl (%eax), %edx
+; X86-NEXT:    xorl 4(%eax), %ecx
+; X86-NEXT:    orl %edx, %ecx
 ; X86-NEXT:    sete %al
-; X86-NEXT:    # kill: def $al killed $al killed $eax
-; X86-NEXT:    retl
-; X86-NEXT:  .LBB0_1:
-; X86-NEXT:    xorl %eax, %eax
-; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: opeq1:
-; X64:       # %bb.0: # %entry
-; X64-NEXT:    movl (%rdi), %eax
-; X64-NEXT:    cmpl (%rsi), %eax
-; X64-NEXT:    jne .LBB0_1
-; X64-NEXT:  # %bb.2: # %land.rhs.i
-; X64-NEXT:    movl 4(%rdi), %eax
-; X64-NEXT:    cmpl 4(%rsi), %eax
+; X64:       # %bb.0: # %opeq1.exit
+; X64-NEXT:    movq (%rdi), %rax
+; X64-NEXT:    cmpq (%rsi), %rax
 ; X64-NEXT:    sete %al
-; X64-NEXT:    # kill: def $al killed $al killed $eax
-; X64-NEXT:    retq
-; X64-NEXT:  .LBB0_1:
-; X64-NEXT:    xorl %eax, %eax
-; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    retq
   %"struct.std::pair"* nocapture readonly dereferenceable(8) %a,
   %"struct.std::pair"* nocapture readonly dereferenceable(8) %b) local_unnamed_addr #0 {
-- 
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