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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/102080] [12 Regression] avx512vl related ICE, on
 firefox-92 gcc ICEs: in expand_insn, at optabs.c:7946 by r12-2679
Date: Fri, 27 Aug 2021 02:16:29 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102080

--- Comment #4 from Hongtao.liu <crazylht at gmail dot com> ---
diff --git a/test.c.032t.ccp1 b/test.c.033t.forwprop1
index 5b18739..c6f0587 100644
--- a/test.c.032t.ccp1
+++ b/test.c.033t.forwprop1
@@ -31,11 +31,12 @@ void EncodedFromDisplay ()
   __m256 __trans_tmp_11;
   vector(8) float _mm256_mul_ps___A.2_1;
   vector(8) float _mm256_mul_ps___B.3_2;
+  vector(8) <signed-boolean:32> _5;
   vector(8) float _mm256_blendv_ps___M.0_6;
   vector(8) float _mm256_blendv_ps___Y.1_7;
   vector(8) int _8;
   vector(8) <signed-boolean:32> _9;
-  vector(8) float _10;
+  vector(8) float _12;

   <bb 2> :
   _mm256_mul_ps___A.2_1 =3D _mm256_mul_ps___A;
@@ -45,8 +46,9 @@ void EncodedFromDisplay ()
   _mm256_blendv_ps___Y.1_7 =3D _mm256_blendv_ps___Y;
   _8 =3D VIEW_CONVERT_EXPR<vector(8) int>(_mm256_blendv_ps___M.0_6);
   _9 =3D _8 < { 0, 0, 0, 0, 0, 0, 0, 0 };
-  _10 =3D VEC_COND_EXPR <_9, _mm256_blendv_ps___Y.1_7, __trans_tmp_11_4>;
-  IfThenElse___trans_tmp_9 =3D _10;
+  _5 =3D _8 >=3D { 0, 0, 0, 0, 0, 0, 0, 0 };
+  _12 =3D .COND_MUL (_5, _mm256_mul_ps___A.2_1, _mm256_mul_ps___B.3_2,
_mm256_blendv_ps___Y.1_7);
+  IfThenElse___trans_tmp_9 =3D _12;
   return;

fwprop1 should check if the type of _5 satisfies the predicate of cond_mul.=