[libclc] Fix dependencies on generated convert builtins #127515
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In llvm#127378 it was reported that builds without clspv targets enabled were failing after llvm#124727, as all targets had a dependency on a file that only clspv targets generated. A quick fix was merged in llvm#127315 which wasn't correct. It moved the dependency on those generated files to the spirv targets, instead of onto the clspv targets. This means a build with spirv targets and without clspv targets would see the same problems as llvm#127378 reported. I tried simply removing the requirement to explicitly add dependencies to the custom command, relying instead on the file-level dependencies. This didn't seem reliable enough; in some cases on a Makefiles build, the clang command compiling (e.g.,) convert.cl would begin before the file was fully written. Instead, we keep the target-level dependency but automatically infer it based on the generated file name, to avoid manual book-keeping of pairs of files and targets. This commit also fixes what looks like an unintended bug where, when ENABLE_RUNTIME_SUBNORMAL was enabled, the OpenCL conversions weren't being compiled.
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In llvm#127378 it was reported that builds without clspv targets enabled were failing after llvm#124727, as all targets had a dependency on a file that only clspv targets generated. A quick fix was merged in llvm#127315 which wasn't correct. It moved the dependency on those generated files to the spirv targets, instead of onto the clspv targets. This means a build with spirv targets and without clspv targets would see the same problems as llvm#127378 reported. I tried simply removing the requirement to explicitly add dependencies to the custom command, relying instead on the file-level dependencies. This didn't seem reliable enough; in some cases on a Makefiles build, the clang command compiling (e.g.,) convert.cl would begin before the file was fully written. Instead, we keep the target-level dependency but automatically infer it based on the generated file name, to avoid manual book-keeping of pairs of files and targets. This commit also fixes what looks like an unintended bug where, when ENABLE_RUNTIME_SUBNORMAL was enabled, the OpenCL conversions weren't being compiled.
YutongZhuu
pushed a commit
to YutongZhuu/llvm-project
that referenced
this pull request
Mar 8, 2025
In llvm#127378 it was reported that builds without clspv targets enabled were failing after llvm#124727, as all targets had a dependency on a file that only clspv targets generated. A quick fix was merged in llvm#127315 which wasn't correct. It moved the dependency on those generated files to the spirv targets, instead of onto the clspv targets. This means a build with spirv targets and without clspv targets would see the same problems as llvm#127378 reported. I tried simply removing the requirement to explicitly add dependencies to the custom command, relying instead on the file-level dependencies. This didn't seem reliable enough; in some cases on a Makefiles build, the clang command compiling (e.g.,) convert.cl would begin before the file was fully written. Instead, we keep the target-level dependency but automatically infer it based on the generated file name, to avoid manual book-keeping of pairs of files and targets. This commit also fixes what looks like an unintended bug where, when ENABLE_RUNTIME_SUBNORMAL was enabled, the OpenCL conversions weren't being compiled.
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In #127378 it was reported that builds without clspv targets enabled were failing after #124727, as all targets had a dependency on a file that only clspv targets generated.
A quick fix was merged in #127315 which wasn't correct. It moved the dependency on those generated files to the spirv targets, instead of onto the clspv targets. This means a build with spirv targets and without clspv targets would see the same problems as #127378 reported.
I tried simply removing the requirement to explicitly add dependencies to the custom command, relying instead on the file-level dependencies. This didn't seem reliable enough; in some cases on a Makefiles build, the clang command compiling (e.g.,) convert.cl would begin before the file was fully written.
Instead, we keep the target-level dependency but automatically infer it based on the generated file name, to avoid manual book-keeping of pairs of files and targets.
This commit also fixes what looks like an unintended bug where, when ENABLE_RUNTIME_SUBNORMAL was enabled, the OpenCL conversions weren't being compiled.