https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64421
Bug ID: 64421 Summary: Incorrect vector function name generated for log Product: gcc Version: 5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: andrew.n.senkevich at gmail dot com Created attachment 34340 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34340&action=edit reduced test Hi, compilation failed with the following code in log.c: #include <math.h> #pragma omp declare simd notinbranch simdlen(2) extern double log (double); int N = 3200; double b[3200]; double a[3200]; int main (void) { int i; #pragma omp simd for (i = 0; i < N; i += 1) { b[i] = log (a[i]); } return (0); } gcc log.c -fopenmp -ffast-math -O1 /tmp/ccjc6yPN.s: Assembler messages: /tmp/ccjc6yPN.s:37: Error: invalid operands (*UND* and *UND* sections) for `*' gcc log.c -fopenmp -ffast-math -O1 -S cat log.s . . . . . call _ZGVbN2v_*__log_finite . . . . . It seems because of wrong asm keyword handling, reduced test is: #pragma omp declare simd notinbranch simdlen(2) extern double log (double) __asm__ ("" "__log_finite") __attribute__ ((__nothrow__ , __leaf__)); int N = 3200; double b[3200]; double a[3200]; int main (void) { int i; #pragma omp simd for (i = 0; i < N; i += 1) { b[i] = log (a[i]); } return (0); } gcc -v . . . . . Target: x86_64-unknown-linux-gnu . . . . . gcc version 5.0.0 20141226 (experimental) (GCC)