generalize the previous code to use the full generality of LEA

for i32/i64 expressions (we could also do i16 on cpus where
i16 lea is fast, but I didn't add this).  On the example, we now
generate:

_test:
	movl	4(%esp), %eax
	cmpl	$42, (%eax)
	setl	%al
	movzbl	%al, %eax
	leal	4(%eax,%eax,8), %eax
	ret

instead of:

_test:
	movl	4(%esp), %eax
	cmpl	$41, (%eax)
	movl	$4, %ecx
	movl	$13, %eax
	cmovg	%ecx, %eax
	ret



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66869 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 0 deletions

diff --git a/test/CodeGen/X86/select-no-cmov.ll b/test/CodeGen/X86/select-no-cmov.ll
index 87382fe3c8..71636f9332 100644
--- a/test/CodeGen/X86/select-no-cmov.ll
+++ b/test/CodeGen/X86/select-no-cmov.ll
@@ -12,3 +12,15 @@ entry:
 	%iftmp.0.0 = select i1 %1, i32 -1, i32 -2		; <i32> [#uses=1]
 	ret i32 %iftmp.0.0
 }
+
+; 	setl	%al
+;	movzbl	%al, %eax
+;	leal	4(%eax,%eax,8), %eax
+define i32 @test2(i32* nocapture %P) nounwind readonly {
+entry:
+	%0 = load i32* %P, align 4		; <i32> [#uses=1]
+	%1 = icmp sgt i32 %0, 41		; <i1> [#uses=1]
+	%iftmp.0.0 = select i1 %1, i32 4, i32 13		; <i32> [#uses=1]
+	ret i32 %iftmp.0.0
+}
+