[X86]: Adding test cases for LEA factorization.

[jbhateja]

Summary

Adding test cases for LEA factorization.

[jbhateja]

Remving an NFC spell correction.

[jbhateja]

LGTM.

[jbhateja]

Simon, can you kindly land this for me into trunk. Thanks.

[RKSimon]

In D35886#821446, @jbhateja wrote:

Simon, can you kindly land this for me into trunk. Thanks.

Done - I'm sorry but I realised as I sent it that I didn't include a 'committed on the behalf' tag in the commit message.

llvm/trunk/test/CodeGen/X86/lea-opt-cse1.ll

+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown | FileCheck %s -check-prefix=X64
+; RUN: llc < %s -mtriple=i686-unknown   | FileCheck %s -check-prefix=X86
+
+%struct.SA = type { i32 , i32  , i32 , i32 ,i32 }
+
+define void @test_func(%struct.SA* nocapture %ctx, i32 %n) local_unnamed_addr {
+; X64-LABEL: test_func:
+; X64:       # BB#0: # %entry
+; X64-NEXT:    movl (%rdi), %eax
+; X64-NEXT:    movl 16(%rdi), %ecx
+; X64-NEXT:    leal (%rax,%rcx), %edx
+; X64-NEXT:    leal 1(%rax,%rcx), %eax
+; X64-NEXT:    movl %eax, 12(%rdi)
+; X64-NEXT:    leal 1(%rcx,%rdx), %eax
+; X64-NEXT:    movl %eax, 16(%rdi)
+; X64-NEXT:    retq
+;
+; X86-LABEL: test_func:
+; X86:       # BB#0: # %entry
+; X86-NEXT:    pushl %esi
+; X86-NEXT:  .Lcfi0:
+; X86-NEXT:    .cfi_def_cfa_offset 8
+; X86-NEXT:  .Lcfi1:
+; X86-NEXT:    .cfi_offset %esi, -8
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl (%eax), %ecx
+; X86-NEXT:    movl 16(%eax), %edx
+; X86-NEXT:    leal 1(%ecx,%edx), %esi
+; X86-NEXT:    addl %edx, %ecx
+; X86-NEXT:    movl %esi, 12(%eax)
+; X86-NEXT:    leal 1(%edx,%ecx), %ecx
+; X86-NEXT:    movl %ecx, 16(%eax)
+; X86-NEXT:    popl %esi
+; X86-NEXT:    retl
+ entry:
+   %h0 = getelementptr inbounds %struct.SA, %struct.SA* %ctx, i64 0, i32 0
+   %0 = load i32, i32* %h0, align 8
+   %h3 = getelementptr inbounds %struct.SA, %struct.SA* %ctx, i64 0, i32 3
+   %h4 = getelementptr inbounds %struct.SA, %struct.SA* %ctx, i64 0, i32 4
+   %1 = load i32, i32* %h4, align 8
+   %add = add i32 %0, 1
+   %add4 = add i32 %add, %1
+   store i32 %add4, i32* %h3, align 4
+   %add29 = add i32 %add4 , %1
+   store i32 %add29, i32* %h4, align 8
+   ret void
+}

llvm/trunk/test/CodeGen/X86/lea-opt-cse2.ll

+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown | FileCheck %s -check-prefix=X64
+; RUN: llc < %s -mtriple=i686-unknown   | FileCheck %s -check-prefix=X86
+
+%struct.SA = type { i32 , i32 , i32 , i32 , i32};
+
+define void @foo(%struct.SA* nocapture %ctx, i32 %n) local_unnamed_addr #0 {
+; X64-LABEL: foo:
+; X64:       # BB#0: # %entry
+; X64-NEXT:    .p2align 4, 0x90
+; X64-NEXT:  .LBB0_1: # %loop
+; X64-NEXT:    # =>This Inner Loop Header: Depth=1
+; X64-NEXT:    movl (%rdi), %eax
+; X64-NEXT:    movl 16(%rdi), %ecx
+; X64-NEXT:    leal 1(%rax,%rcx), %edx
+; X64-NEXT:    movl %edx, 12(%rdi)
+; X64-NEXT:    decl %esi
+; X64-NEXT:    jne .LBB0_1
+; X64-NEXT:  # BB#2: # %exit
+; X64-NEXT:    addl %ecx, %eax
+; X64-NEXT:    leal 1(%rcx,%rax), %eax
+; X64-NEXT:    movl %eax, 16(%rdi)
+; X64-NEXT:    retq
+;
+; X86-LABEL: foo:
+; X86:       # BB#0: # %entry
+; X86-NEXT:    pushl %edi
+; X86-NEXT:  .Lcfi0:
+; X86-NEXT:    .cfi_def_cfa_offset 8
+; X86-NEXT:    pushl %esi
+; X86-NEXT:  .Lcfi1:
+; X86-NEXT:    .cfi_def_cfa_offset 12
+; X86-NEXT:  .Lcfi2:
+; X86-NEXT:    .cfi_offset %esi, -12
+; X86-NEXT:  .Lcfi3:
+; X86-NEXT:    .cfi_offset %edi, -8
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    .p2align 4, 0x90
+; X86-NEXT:  .LBB0_1: # %loop
+; X86-NEXT:    # =>This Inner Loop Header: Depth=1
+; X86-NEXT:    movl (%eax), %edx
+; X86-NEXT:    movl 16(%eax), %esi
+; X86-NEXT:    leal 1(%edx,%esi), %edi
+; X86-NEXT:    movl %edi, 12(%eax)
+; X86-NEXT:    decl %ecx
+; X86-NEXT:    jne .LBB0_1
+; X86-NEXT:  # BB#2: # %exit
+; X86-NEXT:    addl %esi, %edx
+; X86-NEXT:    leal 1(%esi,%edx), %ecx
+; X86-NEXT:    movl %ecx, 16(%eax)
+; X86-NEXT:    popl %esi
+; X86-NEXT:    popl %edi
+; X86-NEXT:    retl
+ entry:
+   br label %loop
+
+ loop:
+   %iter = phi i32 [%n ,%entry ] ,[ %iter.ctr ,%loop]
+   %h0 = getelementptr inbounds %struct.SA, %struct.SA* %ctx, i64 0, i32 0
+   %0 = load i32, i32* %h0, align 8
+   %h3 = getelementptr inbounds %struct.SA, %struct.SA* %ctx, i64 0, i32 3
+   %h4 = getelementptr inbounds %struct.SA, %struct.SA* %ctx, i64 0, i32 4
+   %1 = load i32, i32* %h4, align 8
+   %add = add i32 %0, 1
+   %add4 = add i32 %add, %1
+   store i32 %add4, i32* %h3, align 4
+   %add29 = add i32 %add4, %1
+   %iter.ctr = sub i32 %iter , 1
+   %res = icmp ne i32 %iter.ctr , 0
+   br i1 %res , label %loop , label %exit
+
+ exit:
+   store i32 %add29, i32* %h4, align 8
+   ret void
+}

llvm/trunk/test/CodeGen/X86/lea-opt-cse3.ll

+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown | FileCheck %s -check-prefix=X64
+; RUN: llc < %s -mtriple=i686-unknown   | FileCheck %s -check-prefix=X86
+
+define i32 @foo(i32 %a, i32 %b) local_unnamed_addr #0 {
+; X64-LABEL: foo:
+; X64:       # BB#0: # %entry
+; X64-NEXT:    # kill: %ESI<def> %ESI<kill> %RSI<def>
+; X64-NEXT:    # kill: %EDI<def> %EDI<kill> %RDI<def>
+; X64-NEXT:    leal 4(%rdi,%rsi,2), %ecx
+; X64-NEXT:    leal 4(%rdi,%rsi,4), %eax
+; X64-NEXT:    imull %ecx, %eax
+; X64-NEXT:    retq
+;
+; X86-LABEL: foo:
+; X86:       # BB#0: # %entry
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    leal 4(%ecx,%eax,2), %edx
+; X86-NEXT:    leal 4(%ecx,%eax,4), %eax
+; X86-NEXT:    imull %edx, %eax
+; X86-NEXT:    retl
+entry:
+  %mul = shl i32 %b, 1
+  %add = add i32 %a, 4
+  %add1 = add i32 %add, %mul
+  %mul2 = shl i32 %b, 2
+  %add4 = add i32 %add, %mul2
+  %mul5 = mul nsw i32 %add1, %add4
+  ret i32 %mul5
+}
+