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ac/llvm: Use new denormal_fpenv attribute for llvm >= 23

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Reviwed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39566>
This commit is contained in:
Matt Arsenault 2026-01-24 13:16:38 +01:00 • committed by Marge Bot
parent ec9df376d8
commit c431eaad63
1 changed files with 14 additions and 3 deletions
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17
src/amd/llvm/ac_llvm_build.c
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@ -3641,11 +3641,22 @@ struct ac_llvm_pointer ac_build_main(const struct ac_shader_args *args, struct a
.pointee_type = main_function_type
};
/* Enable denormals for FP16 and FP64: */
LLVMAddTargetDependentFunctionAttr(main_function, "denormal-fp-math", "ieee,ieee");
/* Disable denormals for FP32: */
/* Enable denormals for FP16 and FP64, disable denormals for FP32 */
#if LLVM_VERSION_MAJOR >= 23
LLVMAttributeRef fpenv_attr = LLVMCreateDenormalFPEnvAttribute(ctx,
LLVMDenormalModeKindIEEE,
LLVMDenormalModeKindIEEE,
LLVMDenormalModeKindPreserveSign,
LLVMDenormalModeKindPreserveSign);
LLVMAddAttributeAtIndex(main_function, LLVMAttributeFunctionIndex,
fpenv_attr);
#else
LLVMAddTargetDependentFunctionAttr(main_function, "denormal-fp-math",
"ieee,ieee");
LLVMAddTargetDependentFunctionAttr(main_function, "denormal-fp-math-f32",
"preserve-sign,preserve-sign");
#endif
if (convention == AC_LLVM_AMDGPU_PS) {
LLVMAddTargetDependentFunctionAttr(main_function, "amdgpu-depth-export",