[llvm] 184817d - [X86] Add missing ReadAfterFold attributes from CVTSD2SSrm/CVTSS2SDrm to match the AVX + _Int equivalents

[Simon Pilgrim via llvm-commits]

Author: Simon Pilgrim
Date: 2022-11-05T11:32:26Z
New Revision: 184817d0df00af94168fc9121b42e5a3fd77d8d7

URL: https://github.com/llvm/llvm-project/commit/184817d0df00af94168fc9121b42e5a3fd77d8d7
DIFF: https://github.com/llvm/llvm-project/commit/184817d0df00af94168fc9121b42e5a3fd77d8d7.diff

LOG: [X86] Add missing ReadAfterFold attributes from CVTSD2SSrm/CVTSS2SDrm to match the AVX + _Int equivalents

This was never added in D52886, probably because the defs were already missing the old ReadAfterLd attribute, but they do exhibit the same behaviour of reading the dst reg after the load.

Added: 
    

Modified: 
    llvm/lib/Target/X86/X86InstrSSE.td

Removed: 
    


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diff  --git a/llvm/lib/Target/X86/X86InstrSSE.td b/llvm/lib/Target/X86/X86InstrSSE.td
index f90202e98a94..a31117e377ae 100644
--- a/llvm/lib/Target/X86/X86InstrSSE.td
+++ b/llvm/lib/Target/X86/X86InstrSSE.td
@@ -1301,7 +1301,7 @@ def CVTSD2SSrm  : I<0x5A, MRMSrcMem, (outs FR32:$dst), (ins f64mem:$src),
                     "cvtsd2ss\t{$src, $dst|$dst, $src}",
                     [(set FR32:$dst, (any_fpround (loadf64 addr:$src)))]>,
                     XD, Requires<[UseSSE2, OptForSize]>,
-                    Sched<[WriteCvtSD2SS.Folded]>, SIMD_EXC;
+                    Sched<[WriteCvtSD2SS.Folded, WriteCvtSD2SS.ReadAfterFold]>, SIMD_EXC;
 }
 
 let Uses = [MXCSR], mayRaiseFPException = 1, ExeDomain = SSEPackedSingle in {
@@ -1367,7 +1367,7 @@ def CVTSS2SDrm : I<0x5A, MRMSrcMem, (outs FR64:$dst), (ins f32mem:$src),
                    "cvtss2sd\t{$src, $dst|$dst, $src}",
                    [(set FR64:$dst, (any_fpextend (loadf32 addr:$src)))]>,
                    XS, Requires<[UseSSE2, OptForSize]>,
-                   Sched<[WriteCvtSS2SD.Folded]>, SIMD_EXC;
+                   Sched<[WriteCvtSS2SD.Folded, WriteCvtSS2SD.ReadAfterFold]>, SIMD_EXC;
 } // isCodeGenOnly = 1
 
 let hasSideEffects = 0, Uses = [MXCSR], mayRaiseFPException = 1,