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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."""