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+Steam: Fails to launch (2507 regression, possibly incorrect optimization)
+**What Game**
+Steam (the store itself)
+
+**Describe the bug**
+Fails to launch on asahi post de4becc26e0c22a71b6615b3a2f35050e82fded0
+
+**To Reproduce**
+Launch steam
+
+**Expected behavior**
+The app launches
+
+**System information:**
+ - OS: Linux 6.14
+ - CPU/SoC: Apple M1 Pro
+ - Video driver version: Mesa 25.1.0-r100
+ - RootFS used: Gentoo Asahi Rootfs
+ - FEX version: FEX-2507, bisected to de4becc26e0c22a71b6615b3a2f35050e82fded0
+ - Thunks Enabled: No
+
+**Additional context**
+ - Is this an x86 or x86-64 game: Both
+ - Does this reproduce on AArch64 with Radeon/Intel/Nvidia: Untested
+ - Is this a Vulkan game: N/A
+
+Add any other context about the problem here.
+
+Optimization performed by commit de4becc26e0c22a71b6615b3a2f35050e82fded0 appears to be incorrect:
+It transforms 
+```
+"mov w20, w6",
+"udiv x22, x0, x20",
+"udiv x22, x0, x20",
+```
+into
+```
+"udiv x20, x0, x6",
+"mov w4, w20",
+```
+Which is equivalent to transforming `(a // (b % 2**32)) % 2**32 into (a // b) % 2**32`, which is false for example with `a=2 b=1+2**32`.
+
+Reverting the relevant commit fixes the issue.
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