From 0488fb649a56b7fc89a5814df5308813f9e5a85d Mon Sep 17 00:00:00 2001 From: Dale Johannesen Date: Thu, 30 Sep 2010 23:57:10 +0000 Subject: Massive rewrite of MMX: The x86_mmx type is used for MMX intrinsics, parameters and return values where these use MMX registers, and is also supported in load, store, and bitcast. Only the above operations generate MMX instructions, and optimizations do not operate on or produce MMX intrinsics. MMX-sized vectors <2 x i32> etc. are lowered to XMM or split into smaller pieces. Optimizations may occur on these forms and the result casted back to x86_mmx, provided the result feeds into a previous existing x86_mmx operation. The point of all this is prevent optimizations from introducing MMX operations, which is unsafe due to the EMMS problem. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115243 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/CodeGen/X86/2007-06-15-IntToMMX.ll | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) (limited to 'test/CodeGen/X86/2007-06-15-IntToMMX.ll') diff --git a/test/CodeGen/X86/2007-06-15-IntToMMX.ll b/test/CodeGen/X86/2007-06-15-IntToMMX.ll index 6128d8b92d..660d4fe7b1 100644 --- a/test/CodeGen/X86/2007-06-15-IntToMMX.ll +++ b/test/CodeGen/X86/2007-06-15-IntToMMX.ll @@ -1,17 +1,16 @@ ; RUN: llc < %s -march=x86-64 -mattr=+mmx | grep paddusw -@R = external global <1 x i64> ; <<1 x i64>*> [#uses=1] +@R = external global x86_mmx ; [#uses=1] define void @foo(<1 x i64> %A, <1 x i64> %B) { entry: - %tmp4 = bitcast <1 x i64> %B to <4 x i16> ; <<4 x i16>> [#uses=1] - %tmp6 = bitcast <1 x i64> %A to <4 x i16> ; <<4 x i16>> [#uses=1] - %tmp7 = tail call <4 x i16> @llvm.x86.mmx.paddus.w( <4 x i16> %tmp6, <4 x i16> %tmp4 ) ; <<4 x i16>> [#uses=1] - %tmp8 = bitcast <4 x i16> %tmp7 to <1 x i64> ; <<1 x i64>> [#uses=1] - store <1 x i64> %tmp8, <1 x i64>* @R + %tmp2 = bitcast <1 x i64> %A to x86_mmx + %tmp3 = bitcast <1 x i64> %B to x86_mmx + %tmp7 = tail call x86_mmx @llvm.x86.mmx.paddus.w( x86_mmx %tmp2, x86_mmx %tmp3 ) ; [#uses=1] + store x86_mmx %tmp7, x86_mmx* @R tail call void @llvm.x86.mmx.emms( ) ret void } -declare <4 x i16> @llvm.x86.mmx.paddus.w(<4 x i16>, <4 x i16>) +declare x86_mmx @llvm.x86.mmx.paddus.w(x86_mmx, x86_mmx) declare void @llvm.x86.mmx.emms() -- cgit v1.2.3