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radeonsi: postponed KILL isn't postponed anymore, but maintains WQM

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This restores performance for the drirc workaround, i.e.
KILL_IF does:
   visible = src0 >= 0;
   kill_flag &= visible; // accumulate kills
   amdgcn_kill(wqm_vote(visible)); // kill fully dead quads only

And all helper pixels are killed at the end of the shader:
   amdgcn_kill(kill_flag);

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák
2017-10-04 05:07:50 +02:00
parent da0083f123
commit 2a414c3961
3 changed files with 14 additions and 0 deletions
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7
src/amd/common/ac_llvm_build.c
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@@ -1405,6 +1405,13 @@ LLVMValueRef ac_build_cvt_pkrtz_f16(struct ac_llvm_context *ctx,
AC_FUNC_ATTR_LEGACY);
}
LLVMValueRef ac_build_wqm_vote(struct ac_llvm_context *ctx, LLVMValueRef i1)
{
assert(HAVE_LLVM >= 0x0600);
return ac_build_intrinsic(ctx, "llvm.amdgcn.wqm.vote", ctx->i1,
&i1, 1, AC_FUNC_ATTR_READNONE);
}
void ac_build_kill_if_false(struct ac_llvm_context *ctx, LLVMValueRef i1)
{
if (HAVE_LLVM >= 0x0600) {