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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/113907] [14 regression] ICU miscompiled since on x86
 since r14-5109-ga291237b628f41
Date: Tue, 13 Feb 2024 15:46:37 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113907

--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Diffing the -fdump-{tree,ipa}-all-alias dumps from r14-5108 and r14-5109,
085i.fnsummary still looks good (the 2/4/8 in the ranges corresponds to whe=
ther
it is in 16/32/64 suffixed/infixed function).
But the inline dump already contains presumably bogus
@@ -2426,7 +2426,7 @@ int32_t uprv_copyArray16 (const struct U
     goto <bb 12>; [67.00%]

   <bb 11> [local count: 43795362]:
-  # RANGE [irange] unsigned int [1, 2147483647] MASK 0x7ffffff8 VALUE 0x0
+  # RANGE [irange] unsigned int [8, 2147483647] MASK 0x7ffffff8 VALUE 0x0
   length.37_21 =3D (unsigned int) length_14(D);
   # USE =3D anything=20
   # CLB =3D anything=20
@@ -2437,7 +2437,7 @@ int32_t uprv_copyArray16 (const struct U
   _7 =3D _25;

   <bb 13> [local count: 1073741824]:
-  # RANGE [irange] int32_t [0, +INF] MASK 0x7fffffff VALUE 0x0
+  # RANGE [irange] int32_t [0, 0][2, +INF] MASK 0x7fffffff VALUE 0x0
   # _6 =3D PHI <0(4), _7(12)>
   return _6;

and
@@ -2660,7 +2660,7 @@ int32_t uprv_copyArray32 (const struct U
     goto <bb 12>; [67.00%]

   <bb 11> [local count: 43795362]:
-  # RANGE [irange] unsigned int [1, 2147483647] MASK 0x7ffffff8 VALUE 0x0
+  # RANGE [irange] unsigned int [8, 2147483647] MASK 0x7ffffff8 VALUE 0x0
   length.37_21 =3D (unsigned int) length_14(D);
   # USE =3D anything=20
   # CLB =3D anything=20
@@ -2671,7 +2671,7 @@ int32_t uprv_copyArray32 (const struct U
   _7 =3D _25;

   <bb 13> [local count: 1073741824]:
-  # RANGE [irange] int32_t [0, +INF] MASK 0x7fffffff VALUE 0x0
+  # RANGE [irange] int32_t [0, 0][4, +INF] MASK 0x7fffffff VALUE 0x0
   # _6 =3D PHI <0(4), _7(12)>
   return _6;
hunks, the return in those cases looks still right, but the length before
memcpy looks wrong.=