[PATCH] D92628: [HIP] Fix bug in driver about wavefront size

[Yaxun Liu via Phabricator via cfe-commits]

yaxunl created this revision.
yaxunl added reviewers: tra, arsenm.
Herald added subscribers: kerbowa, nhaehnle, jvesely.
yaxunl requested review of this revision.
Herald added a subscriber: wdng.

The static variable causes it only initialized once and take
the same value for different GPU archs, whereas they
may be different for different GPU archs, e.g. when
there are both gfx900 and gfx1010.

Removing `static` fixes that.


https://reviews.llvm.org/D92628

Files:
  clang/lib/Driver/ToolChains/AMDGPU.cpp
  clang/test/Driver/hip-wavefront-size.hip


Index: clang/test/Driver/hip-wavefront-size.hip
===================================================================
--- /dev/null
+++ clang/test/Driver/hip-wavefront-size.hip
@@ -0,0 +1,21 @@
+// REQUIRES: clang-driver,amdgpu-registered-target
+
+// RUN: %clang -### -target x86_64-linux-gnu \
+// RUN:   --cuda-gpu-arch=gfx900 \
+// RUN:   --rocm-path=%S/Inputs/rocm --cuda-device-only %s \
+// RUN:   2>&1 | FileCheck %s --check-prefixes=WAVE64
+// WAVE64: "-mlink-builtin-bitcode" "{{.*}}oclc_wavefrontsize64_on.bc"{{.*}} "-target-cpu" "gfx900"
+
+// RUN: %clang -### -target x86_64-linux-gnu \
+// RUN:   --cuda-gpu-arch=gfx1010 \
+// RUN:   --rocm-path=%S/Inputs/rocm --cuda-device-only %s \
+// RUN:   2>&1 | FileCheck %s --check-prefixes=WAVE32
+// WAVE32: "-mlink-builtin-bitcode" "{{.*}}oclc_wavefrontsize64_off.bc"{{.*}} "-target-cpu" "gfx1010"
+
+// RUN: %clang -### -target x86_64-linux-gnu \
+// RUN:   --cuda-gpu-arch=gfx1010 \
+// RUN:   --cuda-gpu-arch=gfx900 \
+// RUN:   --rocm-path=%S/Inputs/rocm --cuda-device-only %s \
+// RUN:   2>&1 | FileCheck %s --check-prefixes=BOTH
+// BOTH-DAG: "-mlink-builtin-bitcode" "{{.*}}oclc_wavefrontsize64_on.bc"{{.*}} "-target-cpu" "gfx900"
+// BOTH-DAG: "-mlink-builtin-bitcode" "{{.*}}oclc_wavefrontsize64_off.bc"{{.*}} "-target-cpu" "gfx1010"
Index: clang/lib/Driver/ToolChains/AMDGPU.cpp
===================================================================
--- clang/lib/Driver/ToolChains/AMDGPU.cpp
+++ clang/lib/Driver/ToolChains/AMDGPU.cpp
@@ -499,7 +499,7 @@
 bool AMDGPUToolChain::isWave64(const llvm::opt::ArgList &DriverArgs,
                                llvm::AMDGPU::GPUKind Kind) {
   const unsigned ArchAttr = llvm::AMDGPU::getArchAttrAMDGCN(Kind);
-  static bool HasWave32 = (ArchAttr & llvm::AMDGPU::FEATURE_WAVE32);
+  bool HasWave32 = (ArchAttr & llvm::AMDGPU::FEATURE_WAVE32);
 
   return !HasWave32 || DriverArgs.hasFlag(
     options::OPT_mwavefrontsize64, options::OPT_mno_wavefrontsize64, false);


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