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| author | Tom de Vries <tdevries@suse.de> | 2022-02-10 11:26:16 +0100 |
|---|---|---|
| committer | Tom de Vries <tdevries@suse.de> | 2022-02-11 08:43:14 +0100 |
| commit | fd64b09217fbe8fa33b559e61564071e8aca71e5 (patch) | |
| tree | a73ba9f38e02cfbb6485b12afa071ed1738b3c67 /gcc | |
| parent | a645583d4d68eecdd9101e1013e7bf01907ea786 (diff) | |
| download | gcc-fd64b09217fbe8fa33b559e61564071e8aca71e5.zip gcc-fd64b09217fbe8fa33b559e61564071e8aca71e5.tar.gz gcc-fd64b09217fbe8fa33b559e61564071e8aca71e5.tar.bz2 | |
[nvptx] Handle asm insn in prevent_branch_around_nothing
With GOMP_NVPTX_JIT=-00 and -mptx=3.1, I run into:
...
FAIL: libgomp.oacc-c/../libgomp.oacc-c-c++-common/acc_prof-version-1.c \
-DACC_DEVICE_TYPE_nvidia=1 -DACC_MEM_SHARED=0 -foffload=nvptx-none -O2 \
execution test
...
The problem is that we're generating a diverging branch around nothing:
...
{
.reg.u32 %x;
mov.u32 %x, %tid.x;
setp.ne.u32 %r23, %x, 0;
}
@%r23 bra $L2;
$L2:
...
which the driver JIT has problems with at -O0, so consequently we run into the
nvptx_uniform_warp_check.
Fix this by handling asm ("") and alike in prevent_branch_around_nothing.
Tested on x86_64 with nvptx accelerator.
gcc/ChangeLog:
2022-02-10 Tom de Vries <tdevries@suse.de>
PR target/104456
* config/nvptx/nvptx.cc (prevent_branch_around_nothing): Handle asm
insn.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/nvptx/nvptx.cc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/config/nvptx/nvptx.cc b/gcc/config/nvptx/nvptx.cc index 5b26c0f..afbad5b 100644 --- a/gcc/config/nvptx/nvptx.cc +++ b/gcc/config/nvptx/nvptx.cc @@ -5257,6 +5257,14 @@ prevent_branch_around_nothing (void) case CODE_FOR_nvptx_join: case CODE_FOR_nop: continue; + case -1: + /* Handle asm ("") and similar. */ + if (GET_CODE (PATTERN (insn)) == ASM_INPUT + || GET_CODE (PATTERN (insn)) == ASM_OPERANDS + || (GET_CODE (PATTERN (insn)) == PARALLEL + && asm_noperands (PATTERN (insn)) >= 0)) + continue; + /* FALLTHROUGH. */ default: seen_label = NULL; continue; |