/* Test case for SHIFT_COUNT_TRUNCATED on Loongson. */ /* { dg-do run } */ /* loongson.h does not handle or check for MIPS16ness. There doesn't seem any good reason for it to, given that the Loongson processors do not support MIPS16. */ /* { dg-options "isa=loongson -mhard-float -mno-mips16" } */ /* See PR 52155. */ /* { dg-options "isa=loongson -mhard-float -mno-mips16 -mlong64" { mips*-*-elf* && ilp32 } } */ #include "loongson.h" #include typedef union { int32x2_t v; int32_t a[2]; } int32x2_encap_t; void main1 (int shift) { int32x2_encap_t s; int32x2_encap_t r; s.a[0] = 0xffffffff; s.a[1] = 0xffffffff; /* Loongson SIMD use low-order 7 bits to specify the shift amount. Thus V2SI << 0x40 == 0. The below expression 'shift & 0x3f' will be mis-optimized as 'shift', if SHIFT_COUNT_TRUNCATED is nonzero. */ r.v = psllw_s (s.v, (shift & 0x3f)); assert (r.a[0] == 0xffffffff); assert (r.a[1] == 0xffffffff); } int main (void) { main1 (0x40); return 0; }