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authorChristian Krinitsin <mail@krinitsin.com>2025-05-30 16:52:07 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-05-30 16:52:17 +0200
commit9260319e7411ff8281700a532caa436f40120ec4 (patch)
tree2f6bfe5f3458dd49d328d3a9eb508595450adec0 /gitlab/issues/target_arm/host_missing/accel_TCG/799.toml
parent225caa38269323af1bfc2daadff5ec8bd930747f (diff)
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-id = 799
-title = "TCG Optimizer crashes on AArch64 SVE2 instruction"
-state = "closed"
-created_at = "2022-01-03T10:35:06.082Z"
-closed_at = "2022-01-05T02:53:01.437Z"
-labels = ["Closed::Fixed", "Stable::to backport", "accel: TCG", "kind::Bug", "target: arm"]
-url = "https://gitlab.com/qemu-project/qemu/-/issues/799"
-host-os = "Fedora 35"
-host-arch = "x86_64"
-qemu-version = "QEMU emulator version 6.2.0 (v6.2.0) + QEMU latest master"
-guest-os = "None"
-guest-arch = "ARM aarch64"
-description = """QEMU crashes due to an assertion in the TCG optimizer when optimizing an SVE2 instruction:
-```
-Unrecognized operation 145 in do_constant_folding.
-../tcg/optimize.c:458: tcg fatal error
-```"""
-reproduce = """1. Compile the following minimized reproducer: (a pre-compiled image is provided for convenience - [reproducer.img](/uploads/0bddbfac55306a297fee59dd2f6923cf/reproducer.img))
-```asm
-.org 0x0
-entry:
- mrs x1, cptr_el3
- orr x9, x1, #0x100
- msr cptr_el3, x9
-
- msr cptr_el2, xzr
-
- mov x1, #0x3
- mrs x9, cpacr_el1
- bfi x9, x1, #16, #2
- bfi x9, x1, #20, #2
- msr cpacr_el1, x9
-
- mov x9, 512
- mov x0, x9
- asr x0, x0, 7
- sub x9, x0, #1
- msr zcr_el1, x9
-
- mov x9, 512
- mov x0, x9
- asr x0, x0, 7
- sub x9, x0, #1
- msr zcr_el2, x9
-
- mov x9, 512
- mov x0, x9
- asr x0, x0, 7
- sub x9, x0, #1
- msr zcr_el3, x9
-
- uqxtnt z11.s, z22.d
-```
-2. Execute it using the command line given above."""
-additional = """I tested latest master as well, and the problem persists."""