https://github.com/llvm-beanz created
https://github.com/llvm/llvm-project/pull/90694
We had some odd places where we set target behaviors. We were setting the long
size in target-specific code, but it should be language-based. We were not
setting the Half float type semantics correctly, and instead were overriding
the query in the AST context.
This change is NFC, but it moves existing code to the right places in the
Target so that as we continue working on target and language feature they are
controlled in the right places.
>From 2464bcb75b047c49076f0718470f27a561252a62 Mon Sep 17 00:00:00 2001
From: Chris Bieneman <chris.biene...@me.com>
Date: Tue, 30 Apr 2024 20:49:35 -0500
Subject: [PATCH] [NFC][HLSL] Cleanup TargetInfo handling
We had some odd places where we set target behaviors. We were setting
the long size in target-specific code, but it should be language-based.
We were not setting the Half float type semantics correctly, and instead
were overriding the query in the AST context.
This change is NFC, but it moves existing code to the right places in
the Target so that as we continue working on target and language feature
they are controlled in the right places.
---
clang/lib/AST/ASTContext.cpp | 10 +---------
clang/lib/Basic/TargetInfo.cpp | 10 ++++++++++
clang/lib/Basic/Targets/DirectX.h | 1 -
3 files changed, 11 insertions(+), 10 deletions(-)
diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index cbf4932aff9a6b..565870eba7014f 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -1612,15 +1612,7 @@ const llvm::fltSemantics
&ASTContext::getFloatTypeSemantics(QualType T) const {
case BuiltinType::Float16:
return Target->getHalfFormat();
case BuiltinType::Half:
- // For HLSL, when the native half type is disabled, half will be treat as
- // float.
- if (getLangOpts().HLSL)
- if (getLangOpts().NativeHalfType)
- return Target->getHalfFormat();
- else
- return Target->getFloatFormat();
- else
- return Target->getHalfFormat();
+ return Target->getHalfFormat();
case BuiltinType::Float: return Target->getFloatFormat();
case BuiltinType::Double: return Target->getDoubleFormat();
case BuiltinType::Ibm128:
diff --git a/clang/lib/Basic/TargetInfo.cpp b/clang/lib/Basic/TargetInfo.cpp
index f96956f31d50dc..29f5cd14e46e11 100644
--- a/clang/lib/Basic/TargetInfo.cpp
+++ b/clang/lib/Basic/TargetInfo.cpp
@@ -406,6 +406,16 @@ void TargetInfo::adjust(DiagnosticsEngine &Diags,
LangOptions &Opts) {
LongDoubleAlign = 64;
}
+ // HLSL explicitly defines the sizes and formats of some data types, and we
+ // need to conform to those regardless of what architecture you are
targeting.
+ if (Opts.HLSL) {
+ LongWidth = LongAlign = 64;
+ if (!Opts.NativeHalfType) {
+ HalfFormat = &llvm::APFloat::IEEEsingle();
+ HalfWidth = HalfAlign = 32;
+ }
+ }
+
if (Opts.OpenCL) {
// OpenCL C requires specific widths for types, irrespective of
// what these normally are for the target.
diff --git a/clang/lib/Basic/Targets/DirectX.h
b/clang/lib/Basic/Targets/DirectX.h
index acfcc8c47ba950..a084e2823453fc 100644
--- a/clang/lib/Basic/Targets/DirectX.h
+++ b/clang/lib/Basic/Targets/DirectX.h
@@ -53,7 +53,6 @@ class LLVM_LIBRARY_VISIBILITY DirectXTargetInfo : public
TargetInfo {
: TargetInfo(Triple) {
TLSSupported = false;
VLASupported = false;
- LongWidth = LongAlign = 64;
AddrSpaceMap = &DirectXAddrSpaceMap;
UseAddrSpaceMapMangling = true;
HasLegalHalfType = true;
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