Handle i1/i8/i16 constant integer arguments to calls by prepromoting them.

Before we would bail out on i1 arguments all together, now we just bail on
non-constant ones.  Also, we used to emit extraneous code.  e.g. test12 was:

	movb	$0, %al
	movzbl	%al, %edi
	callq	_test12

and test13 was:
	movb	$0, %al
	xorl	%edi, %edi
	movb	%al, 7(%rsp)
	callq	_test13f

Now we get:

	movl	$0, %edi
	callq	_test12
and:
	movl	$0, %edi
	callq	_test13f

llvm-svn: 129751

1 files changed, 12 insertions, 1 deletions

diff --git a/llvm/test/CodeGen/X86/fast-isel-x86-64.ll b/llvm/test/CodeGen/X86/fast-isel-x86-64.ll
index 0c289e37975..2e6bafe0720 100644
--- a/llvm/test/CodeGen/X86/fast-isel-x86-64.ll
+++ b/llvm/test/CodeGen/X86/fast-isel-x86-64.ll
@@ -143,6 +143,17 @@ if.end:                                           ; preds = %if.then, %entry
 ; CHECK: test12:
 ; CHECK: testb	$1,
 ; CHECK-NEXT: je L
-; CHECK-NEXT: movb	$0, %al
+; CHECK-NEXT: movl $0, %edi
+; CHECK-NEXT: callq
+}
+
+declare void @test13f(i1 %X)
+
+define void @test13() nounwind {
+  call void @test13f(i1 0)
+  ret void
+; CHECK: test13:
+; CHECK: movl $0, %edi
+; CHECK-NEXT: callq
 }