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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@362886 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/neg-of-3ops-lea.ll b/test/CodeGen/X86/neg-of-3ops-lea.ll
new file mode 100644 (file)
index 0000000..4fc77a5
--- /dev/null
+++ b/test/CodeGen/X86/neg-of-3ops-lea.ll
@@ -0,0 +1,86 @@
+; 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
+}