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* [gcc r12-8482] Fix ICE in extract_insn, at recog.cc:2791
@ 2022-06-15 5:57 hongtao Liu
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From: hongtao Liu @ 2022-06-15 5:57 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:bac09a893145056217b1e9a0054466a770815c43
commit r12-8482-gbac09a893145056217b1e9a0054466a770815c43
Author: liuhongt <hongtao.liu@intel.com>
Date: Tue Jun 14 16:27:04 2022 +0800
Fix ICE in extract_insn, at recog.cc:2791
(In reply to Uroš Bizjak from comment #1)
> Instruction does not accept memory operand for operand 3:
>
> (define_insn_and_split
> "*<sse4_1>_blendv<ssefltmodesuffix><avxsizesuffix>_ltint"
> [(set (match_operand:<ssebytemode> 0 "register_operand" "=Yr,*x,x")
> (unspec:<ssebytemode>
> [(match_operand:<ssebytemode> 1 "register_operand" "0,0,x")
> (match_operand:<ssebytemode> 2 "vector_operand" "YrBm,*xBm,xm")
> (subreg:<ssebytemode>
> (lt:VI48_AVX
> (match_operand:VI48_AVX 3 "register_operand" "Yz,Yz,x")
> (match_operand:VI48_AVX 4 "const0_operand")) 0)]
> UNSPEC_BLENDV))]
>
> The problematic insn is:
>
> (define_insn_and_split "*avx_cmp<mode>3_ltint_not"
> [(set (match_operand:VI48_AVX 0 "register_operand")
> (vec_merge:VI48_AVX
> (match_operand:VI48_AVX 1 "vector_operand")
> (match_operand:VI48_AVX 2 "vector_operand")
> (unspec:<avx512fmaskmode>
> [(subreg:VI48_AVX
> (not:<ssebytemode>
> (match_operand:<ssebytemode> 3 "vector_operand")) 0)
> (match_operand:VI48_AVX 4 "const0_operand")
> (match_operand:SI 5 "const_0_to_7_operand")]
> UNSPEC_PCMP)))]
>
> which gets split to the above pattern.
>
> In the preparation statements we have:
>
> if (!MEM_P (operands[3]))
> operands[3] = force_reg (<ssebytemode>mode, operands[3]);
> operands[3] = lowpart_subreg (<MODE>mode, operands[3], <ssebytemode>mode);
>
> Which won't fly when operand 3 is memory operand...
>
gcc/ChangeLog:
PR target/105953
* config/i386/sse.md (*avx_cmp<mode>3_ltint_not): Force_reg
operands[3].
gcc/testsuite/ChangeLog:
* g++.target/i386/pr105953.C: New test.
Diff:
---
gcc/config/i386/sse.md | 3 +--
gcc/testsuite/g++.target/i386/pr105953.C | 4 ++++
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 3a3ea609fda..2ce1aed4ad9 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -3627,8 +3627,7 @@
gen_lowpart (<ssebytemode>mode, operands[1]));
operands[2] = gen_lowpart (<ssebytemode>mode, operands[2]);
- if (!MEM_P (operands[3]))
- operands[3] = force_reg (<ssebytemode>mode, operands[3]);
+ operands[3] = force_reg (<ssebytemode>mode, operands[3]);
operands[3] = lowpart_subreg (<MODE>mode, operands[3], <ssebytemode>mode);
})
diff --git a/gcc/testsuite/g++.target/i386/pr105953.C b/gcc/testsuite/g++.target/i386/pr105953.C
new file mode 100644
index 00000000000..b423d2dfdae
--- /dev/null
+++ b/gcc/testsuite/g++.target/i386/pr105953.C
@@ -0,0 +1,4 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mavx512vl -mabi=ms" } */
+
+#include "pr100738-1.C"
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