Extension of r107506. Make sure that we don't mark a function as having a call

if the inline ASM doesn't need a stack frame.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107922 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/X86/leaf-fp-elim.ll

@@ -0,0 +1,30 @@
+; RUN: llc < %s -disable-non-leaf-fp-elim -relocation-model=pic -mtriple=x86_64-apple-darwin | FileCheck %s
+; <rdar://problem/8170192>
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+target triple = "x86_64-apple-darwin11.0"
+
+@msg = internal global i8* null                   ; <i8**> [#uses=1]
+@.str = private constant [2 x i8] c"x\00", align 1 ; <[2 x i8]*> [#uses=1]
+
+define void @test(i8* %p) nounwind optsize ssp {
+
+; No stack frame, please.
+; CHECK:     _test
+; CHECK-NOT: pushq %rbp
+; CHECK-NOT: movq %rsp, %rbp
+; CHECK:     InlineAsm Start
+
+entry:
+  %0 = icmp eq i8* %p, null                       ; <i1> [#uses=1]
+  br i1 %0, label %return, label %bb
+
+bb:                                               ; preds = %entry
+  tail call void asm "mov $1, $0", "=*m,{cx},~{dirflag},~{fpsr},~{flags}"(i8** @msg, i8* getelementptr inbounds ([2 x i8]* @.str, i64 0, i64 0)) nounwind
+  tail call void @llvm.trap()
+  unreachable
+
+return:                                           ; preds = %entry
+  ret void
+}
+
+declare void @llvm.trap() nounwind