[Bug target/69525] [6 Regression] ICE: Segmentation fault in ix86_expand_prologue

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69525

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(Too much) reduced testcase, it requires the uninit use of r:

typedef unsigned long long int ULong;
typedef union { ULong w64[2]; } V128;
typedef unsigned long HWord;
void amd64g_dirtyhelper_AES (HWord opc4, V128* argD, V128 *argL)
{
  V128 r;
  argD->w64[1] = r.w64[1] ^ argL->w64[1];
}