Implement basic support for the 'f' register class constraint. This basically

works, but probably won't if you mix it with 't' or 'u' yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48243 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 14 insertions, 0 deletions

diff --git a/test/CodeGen/X86/inline-asm-fpstack.ll b/test/CodeGen/X86/inline-asm-fpstack.ll
index 1e308d9..91f2f2f 100644
--- a/test/CodeGen/X86/inline-asm-fpstack.ll
+++ b/test/CodeGen/X86/inline-asm-fpstack.ll
@@ -26,4 +26,18 @@ define void @test5(double %X) {
         ret void
 }
 
+define void @test6(double %A, double %B, double %C, 
+                   double %D, double %E) nounwind  {
+entry:
+	; Uses the same value twice, should have one fstp after the asm.
+	tail call void asm sideeffect "foo $0 $1", "f,f,~{dirflag},~{fpsr},~{flags}"( double %A, double %A ) nounwind 
+	; Uses two different values, should be in st(0)/st(1) and both be popped.
+	tail call void asm sideeffect "bar $0 $1", "f,f,~{dirflag},~{fpsr},~{flags}"( double %B, double %C ) nounwind 
+	; Uses two different values, one of which isn't killed in this asm, it
+	; should not be popped after the asm.
+	tail call void asm sideeffect "baz $0 $1", "f,f,~{dirflag},~{fpsr},~{flags}"( double %D, double %E ) nounwind 
+	; This is the last use of %D, so it should be popped after.
+	tail call void asm sideeffect "baz $0", "f,~{dirflag},~{fpsr},~{flags}"( double %D ) nounwind 
+	ret void
+}