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ac: set +auto-waitcnt-before-barrier when needed

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This removes useless s_waitcnt before barriers.
Only radeonsi uses this function.
This commit is contained in:
Marek Olšák
2018-06-14 01:27:10 -04:00
parent 7d6ec9d43b
commit 8e9c57a7fe
1 changed files with 4 additions and 2 deletions
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6
src/amd/common/ac_llvm_util.c
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@@ -133,13 +133,15 @@ LLVMTargetMachineRef ac_create_target_machine(enum radeon_family family,
char features[256];
const char *triple = (tm_options & AC_TM_SUPPORTS_SPILL) ? "amdgcn-mesa-mesa3d" : "amdgcn--";
LLVMTargetRef target = ac_get_llvm_target(triple);
bool barrier_does_waitcnt = true; /* TODO: not for Vega20 */
snprintf(features, sizeof(features),
"+DumpCode,+vgpr-spilling,-fp32-denormals,+fp64-denormals%s%s%s%s",
"+DumpCode,+vgpr-spilling,-fp32-denormals,+fp64-denormals%s%s%s%s%s",
tm_options & AC_TM_SISCHED ? ",+si-scheduler" : "",
tm_options & AC_TM_FORCE_ENABLE_XNACK ? ",+xnack" : "",
tm_options & AC_TM_FORCE_DISABLE_XNACK ? ",-xnack" : "",
tm_options & AC_TM_PROMOTE_ALLOCA_TO_SCRATCH ? ",-promote-alloca" : "");
tm_options & AC_TM_PROMOTE_ALLOCA_TO_SCRATCH ? ",-promote-alloca" : "",
barrier_does_waitcnt ? ",+auto-waitcnt-before-barrier" : "");
LLVMTargetMachineRef tm = LLVMCreateTargetMachine(
target,