From ab98c41337f8236169651efce4c59a6643ac303d Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 24 Nov 2007 06:13:33 +0000
Subject: [PATCH] add a note

llvm-svn: 44299
---
 llvm/lib/Target/X86/README.txt | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/llvm/lib/Target/X86/README.txt b/llvm/lib/Target/X86/README.txt
index 9a5ca427e1e1..af73658bb362 100644
--- a/llvm/lib/Target/X86/README.txt
+++ b/llvm/lib/Target/X86/README.txt
@@ -1511,3 +1511,24 @@ LBB1_4:	# cond_true
         cmpl    $262144, %eax
 
 //===---------------------------------------------------------------------===//
+
+define i64 @test(double %X) {
+	%Y = fptosi double %X to i64
+	ret i64 %Y
+}
+
+compiles to:
+
+_test:
+	subl	$20, %esp
+	movsd	24(%esp), %xmm0
+	movsd	%xmm0, 8(%esp)
+	fldl	8(%esp)
+	fisttpll	(%esp)
+	movl	4(%esp), %edx
+	movl	(%esp), %eax
+	addl	$20, %esp
+	#FP_REG_KILL
+	ret
+
+This should just fldl directly from the input stack slot.