[Bug target/121584] -ftrivial-auto-var-init=pattern is incompatible with opaque sizeless types in ARM C Language Extensions (ACLE)

[harald at gigawatt dot nl via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121584

Harald van Dijk <harald at gigawatt dot nl> changed:

           What    |Removed                     |Added
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                 CC|                            |harald at gigawatt dot nl

--- Comment #2 from Harald van Dijk <harald at gigawatt dot nl> ---
Standalone minimal test:

  #pragma GCC aarch64 "arm_sve.h"
  void foo() {
    svfloat32x2_t x;
  }

Compile with gcc -march=armv9-a -ftrivial-auto-var-init=pattern:

  <source>: In function 'void foo()':
  <source>:3:17: sorry, unimplemented: __builtin_clear_padding not supported
for variable length aggregates
      3 |   svfloat32x2_t x;
        |                 ^

https://godbolt.org/z/rjzqedEKf