From 2990853ea8bf4888b179ac6c493836b83769e87b Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Sat, 7 Dec 2013 09:39:35 +0000
Subject: Merging r196261:
 ------------------------------------------------------------------------
 r196261 | hliao | 2013-12-03 01:17:32 -0800 (Tue, 03 Dec 2013) | 13 lines

Enhance the fix of PR17631

- The fix to PR17631 fixes part of the cases where 'vzeroupper' should
  not be issued before 'call' insn. There're other cases where helper
  calls will be inserted not limited to epilog. These helper calls do
  not follow the standard calling convention and won't clobber any YMM
  registers. (So far, all call conventions will clobber any or part of
  YMM registers.)
  This patch enhances the previous fix to cover more cases 'vzerosupper' should
  not be inserted by checking if that function call won't clobber any YMM
  registers and skipping it if so.


------------------------------------------------------------------------


git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_34@196652 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/X86/pr17631.ll | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

(limited to 'test')

diff --git a/test/CodeGen/X86/pr17631.ll b/test/CodeGen/X86/pr17631.ll
index a572ff2e3b..98f951f1b1 100644
--- a/test/CodeGen/X86/pr17631.ll
+++ b/test/CodeGen/X86/pr17631.ll
@@ -1,16 +1,16 @@
 ; RUN: llc < %s -mcpu=core-avx-i -mtriple=i386-pc-win32 | FileCheck %s
- 
+
 %struct_type = type { [64 x <8 x float>], <8 x float> }
- 
+
 ; Function Attrs: nounwind readnone
 declare i32 @llvm.x86.avx.movmsk.ps.256(<8 x float>)
- 
+
 ; Function Attrs: nounwind
 define i32 @equal(<8 x i32> %A) {
 allocas:
   %first_alloc  = alloca [64 x <8 x i32>]
   %second_alloc = alloca %struct_type
- 
+
   %A1 = bitcast <8 x i32> %A to <8 x float>
   %A2 = call i32 @llvm.x86.avx.movmsk.ps.256(<8 x float> %A1)
   ret i32 %A2
@@ -20,3 +20,15 @@ allocas:
 ; CHECK-NOT: vzeroupper
 ; CHECK: _chkstk
 ; CHECK: ret
+
+define <8 x float> @foo(<8 x float> %y, i64* %p, double %x) {
+  %i = fptoui double %x to i64
+  store i64 %i, i64* %p
+  %ret = fadd <8 x float> %y, %y
+  ret <8 x float> %ret
+}
+
+; CHECK: foo
+; CHECK-NOT: vzeroupper
+; CHECK: _ftol2
+; CHECK: ret
-- 
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