http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49410
Summary: Internal compiler error in change-stack at reg-stack.c:2540 Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: inline-asm AssignedTo: unassig...@gcc.gnu.org ReportedBy: gcc.h...@gmail.com I saw this while experimenting with the (probably incorrect) inline x87 assembler: test.c: In function 'main': test.c:16:1: internal compiler error: in change_stack, at reg-stack.c:2540 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. ---------------------------------------------------------- #include <stdio.h> int main( int argc, char *argv[] ) { long double x, n = 1234.0L; asm( "fldpi; fmulp; fsqrt" : "=t" (x) : "u" (n) ); printf("sqrt(pi * n) = %Lg\n", x ); } ---------------------------------------------------------- gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/i686-pc-linux-gnu/4.6.0/lto-wrapper Target: i686-pc-linux-gnu Configured with: ../gcc-4.6.0/configure Thread model: posix gcc version 4.6.0 (GCC)