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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/102907] New: aarch64/shrn-combine-[123].c fail with SVE
Date: Fri, 22 Oct 2021 23:14:38 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102907

            Bug ID: 102907
           Summary: aarch64/shrn-combine-[123].c fail with SVE
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: clyon at gcc dot gnu.org
  Target Milestone: ---

Hi Tamar,
I have noticed that the new tests shrn-combine-[123].c fail when running the
tests with -march=3Darmv8.3-a+sve:
PASS: gcc.target/aarch64/shrn-combine-1.c (test for excess errors)
gcc.target/aarch64/shrn-combine-1.c: \\tshrn\\t found 0 times
FAIL: gcc.target/aarch64/shrn-combine-1.c scan-assembler-times \\tshrn\\t 1
gcc.target/aarch64/shrn-combine-1.c: \\tshrn2\\t found 0 times
FAIL: gcc.target/aarch64/shrn-combine-1.c scan-assembler-times \\tshrn2\\t 1

PASS: gcc.target/aarch64/shrn-combine-2.c (test for excess errors)
gcc.target/aarch64/shrn-combine-2.c: \\tshrn\\t found 0 times
FAIL: gcc.target/aarch64/shrn-combine-2.c scan-assembler-times \\tshrn\\t 1
gcc.target/aarch64/shrn-combine-2.c: \\tshrn2\\t found 0 times
FAIL: gcc.target/aarch64/shrn-combine-2.c scan-assembler-times \\tshrn2\\t 1

PASS: gcc.target/aarch64/shrn-combine-3.c (test for excess errors)
gcc.target/aarch64/shrn-combine-3.c: \\tshrn\\t found 0 times
FAIL: gcc.target/aarch64/shrn-combine-3.c scan-assembler-times \\tshrn\\t 1
gcc.target/aarch64/shrn-combine-3.c: \\tshrn2\\t found 0 times
FAIL: gcc.target/aarch64/shrn-combine-3.c scan-assembler-times \\tshrn2\\t 1

(and similarly with -march=3Darmv8.5-a+sve2)

I haven't checked the actual generated code.=