add note about sin

llvm-svn: 65137
2009-02-20 18:42:06 +00:00 · 2009-02-20 18:42:06 +00:00 · 87d5ca083b
parent c380864d2c
commit 87d5ca083b
1 changed files with 15 additions and 0 deletions
--- a/llvm/lib/Target/README.txt
+++ b/llvm/lib/Target/README.txt
@ -1689,3 +1689,18 @@ for next field in struct (which is at same address).
 For example: store of float into { {{}}, float } could be turned into a store to
 the float directly.

+//===---------------------------------------------------------------------===//
+#include <math.h>
+double foo(double a) {    return sin(a); }
+
+This compiles into this on x86-64 Linux:
+foo:
+	subq	$8, %rsp
+	call	sin
+	addq	$8, %rsp
+	ret
+vs:
+
+foo:
+        jmp sin
+