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[X86][Codegen] Add missed pattern that may be a lea+neg

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llvm-svn: 362886
This commit is contained in:
Roman Lebedev 2019-06-08 19:38:14 +00:00
parent bc9b63be1d
commit 801d3ed1c5
1 changed files with 86 additions and 0 deletions
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test/CodeGen/X86/neg-of-3ops-lea.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-- -mattr=+slow-3ops-lea | FileCheck %s -check-prefixes=CHECK,X86,SLOW,SLOW-X86
; RUN: llc < %s -mtriple=i686-- -mattr=-slow-3ops-lea | FileCheck %s -check-prefixes=CHECK,X86,FAST,FAST-X86
; RUN: llc < %s -mtriple=x86_64-- -mattr=+slow-3ops-lea | FileCheck %s -check-prefixes=CHECK,X64,SLOW,SLOW-X64
; RUN: llc < %s -mtriple=x86_64-- -mattr=-slow-3ops-lea | FileCheck %s -check-prefixes=CHECK,X64,FAST,FAST-X64
; )32-a)-b --> 32-(a+b) --> -(a+b)+32 --> -((a+b)-32) -> -(a+b+(-32))
define i32 @t0(i32 %a, i32 %b) {
; X86-LABEL: t0:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: addl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl $32, %eax
; X86-NEXT: subl %ecx, %eax
; X86-NEXT: retl
;
; X64-LABEL: t0:
; X64: # %bb.0:
; X64-NEXT: addl %esi, %edi
; X64-NEXT: movl $32, %eax
; X64-NEXT: subl %edi, %eax
; X64-NEXT: retq
%t0 = sub i32 32, %a
%r = sub i32 %t0, %b
ret i32 %r
}
define i32 @t1(i32 %a, i32 %b) {
; X86-LABEL: t1:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: addl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl $32, %eax
; X86-NEXT: subl %ecx, %eax
; X86-NEXT: retl
;
; X64-LABEL: t1:
; X64: # %bb.0:
; X64-NEXT: addl %esi, %edi
; X64-NEXT: movl $32, %eax
; X64-NEXT: subl %edi, %eax
; X64-NEXT: retq
%t0 = add i32 %a, %b
%r = sub i32 32, %t0
ret i32 %r
}
define i32 @t2(i32 %a, i32 %b) {
; X86-LABEL: t2:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: addl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl $32, %eax
; X86-NEXT: subl %ecx, %eax
; X86-NEXT: retl
;
; X64-LABEL: t2:
; X64: # %bb.0:
; X64-NEXT: addl %esi, %edi
; X64-NEXT: movl $32, %eax
; X64-NEXT: subl %edi, %eax
; X64-NEXT: retq
%t0 = add i32 %a, %b
%t1 = sub i32 0, %t0
%r = add i32 %t1, 32
ret i32 %r
}
define i32 @t3(i32 %a, i32 %b) {
; X86-LABEL: t3:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: addl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl $32, %eax
; X86-NEXT: subl %ecx, %eax
; X86-NEXT: retl
;
; X64-LABEL: t3:
; X64: # %bb.0:
; X64-NEXT: addl %esi, %edi
; X64-NEXT: movl $32, %eax
; X64-NEXT: subl %edi, %eax
; X64-NEXT: retq
%t0 = add i32 %a, %b
%t1 = sub i32 %t0, 32
%r = sub i32 0, %t1
ret i32 %r
}