From 239ffb30b0cefd4e5eb9b410e92bc7df51936233 Mon Sep 17 00:00:00 2001 From: Michael Liao Date: Tue, 3 Dec 2013 09:17:32 +0000 Subject: 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/trunk@196261 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 -- cgit v1.2.3