diff options
| -rw-r--r-- | gcc/reg-stack.c | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr103097.c | 30 |
2 files changed, 32 insertions, 3 deletions
diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c index 1d9ea03..cc369f0 100644 --- a/gcc/reg-stack.c +++ b/gcc/reg-stack.c @@ -453,7 +453,7 @@ get_true_reg (rtx *pat) } } -/* Set if we find any malformed asms in a block. */ +/* Set if we find any malformed asms in a function. */ static bool any_malformed_asm; /* There are many rules that an asm statement for stack-like regs must @@ -3014,8 +3014,6 @@ convert_regs_1 (basic_block block) bool cfg_altered = false; int debug_insns_with_starting_stack = 0; - any_malformed_asm = false; - /* Choose an initial stack layout, if one hasn't already been chosen. */ if (bi->stack_in.top == -2) { @@ -3385,6 +3383,7 @@ reg_to_stack (void) 0, sizeof (char) * (max_uid + 1)); convert_regs (); + any_malformed_asm = false; free_aux_for_blocks (); return true; diff --git a/gcc/testsuite/gcc.target/i386/pr103097.c b/gcc/testsuite/gcc.target/i386/pr103097.c new file mode 100644 index 0000000..2b7a307 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr103097.c @@ -0,0 +1,30 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fharden-conditional-branches" } */ + +/* This is a slightly simplified version of + gcc.target/s390/vector/long-double-asm-earlyclobber.c. On x86, the f + constraints in asm statements imposes some requirements that the testcase + doesn't meet. What's unusual is that -fharden-conditional-branches extends + the effects of the malformed asm onto a different basic blocks, which + reg-stack did not expect. */ + +#include <assert.h> +#include <stdint.h> + +void +f (void) +{ + long double res, x = 0; + asm("" : "=f"(res) /* { dg-error "must specify a single register" } */ + : "0"(x)); + assert (res == x); +} + +void +g (void) +{ + long double res, x = 0; + asm("" : "=g"(res) /* this is ok. */ + : "0"(x)); + assert (res == x); +} |