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+
+
+
+TCG Optimizer crashes on AArch64 SVE2 instruction
+Description of problem:
+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
+```
+Steps to 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 information:
+I tested latest master as well, and the problem persists.