diff options
| -rw-r--r-- | gcc/combine.c | 14 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr99905.c | 33 |
2 files changed, 42 insertions, 5 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index dffa3b0..6cb5b0c 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -7409,11 +7409,15 @@ expand_compound_operation (rtx x) mode, tem, modewidth - len); } else if (unsignedp && len < HOST_BITS_PER_WIDE_INT) - tem = simplify_and_const_int (NULL_RTX, mode, - simplify_shift_const (NULL_RTX, LSHIFTRT, - mode, XEXP (x, 0), - pos), - (HOST_WIDE_INT_1U << len) - 1); + { + tem = simplify_shift_const (NULL_RTX, LSHIFTRT, inner_mode, + XEXP (x, 0), pos); + tem = gen_lowpart (mode, tem); + if (!tem || GET_CODE (tem) == CLOBBER) + return x; + tem = simplify_and_const_int (NULL_RTX, mode, tem, + (HOST_WIDE_INT_1U << len) - 1); + } else /* Any other cases we can't handle. */ return x; diff --git a/gcc/testsuite/gcc.target/i386/pr99905.c b/gcc/testsuite/gcc.target/i386/pr99905.c new file mode 100644 index 0000000..6d1b230 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr99905.c @@ -0,0 +1,33 @@ +/* PR rtl-optimization/99905 */ +/* { dg-do run { target int128 } } */ +/* { dg-options "-Os -mno-mmx -mno-sse" } */ + +typedef unsigned char U; +typedef unsigned char __attribute__((__vector_size__ (8))) A; +typedef unsigned char __attribute__((__vector_size__ (16))) B; +typedef unsigned char __attribute__((__vector_size__ (32))) C; +typedef unsigned int __attribute__((__vector_size__ (8))) D; +typedef unsigned long long __attribute__((__vector_size__ (8))) E; +typedef unsigned __int128 I; +typedef unsigned long long L; + +D gv; +I gi; + +L __attribute__((__noipa__)) +foo (int ua, int ub, int uc, int ud, E ue, I i) +{ + D d = (U) __builtin_bswap16 (i >> 63) + gv; + B y = ((union { C a; B b[2];}) (C){ }).b[0] + (B) gi; + A z = ((union { B a; A b[2];}) y).b[0] + (A) d; + return (L)z; +} + +int +main () +{ + L x = foo (0, 0, 0, 0, (E) { }, (I) 0x100 << 63); + if (x != 0x100000001) + __builtin_abort (); + return 0; +} |