[IR] Remove size argument from lifetime intrinsics #150248
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Split out from llvm#150248: Since llvm#150944 the size passed to lifetime.start/end is considered meaningless. The lifetime always applies to the whole alloca. This adjusts MemoryLocation to determine the MemoryLocation size from the alloca size, instead of using the argument.
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Split out from llvm#150248: Use the size of the alloca instead of the size passed to the lifetime intrinsic. As a bonus, this handles dynamic allocas correctly (see the added test) instead of doing a memset with size -1...
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Split out from llvm#150248: Use the size of the alloca instead of the size passed to the lifetime intrinsic. As a bonus, this handles dynamic allocas correctly (see the added test) instead of doing a memset with size -1...
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Split out from #150248: Use the size of the alloca instead of the size passed to the lifetime intrinsic. As a bonus, this handles dynamic allocas correctly (see the added test) instead of doing a memset with size -1...
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…154) Split out from llvm/llvm-project#150248: Use the size of the alloca instead of the size passed to the lifetime intrinsic. As a bonus, this handles dynamic allocas correctly (see the added test) instead of doing a memset with size -1...
efriedma-quic
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Aug 7, 2025
Now that llvm#149310 has restricted lifetime intrinsics to only work on allocas, we can also drop the explicit size argument. Instead, the size is implied by the alloca. This removes the ability to only mark a prefix of an alloca alive/dead. We never used that capability, so we should remove the need to handle that possibility everywhere (many key places, including stack coloring, did not actually respect this).
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LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/190/builds/25074 Here is the relevant piece of the build log for the reference |
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In llvm/llvm-project#150248 LLVM removed the size parameter from the lifetime format. Tolerate not having that size parameter.
maurer
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In llvm/llvm-project#150248 LLVM removed the size parameter from the lifetime format. Tolerate not having that size parameter.
maurer
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Aug 8, 2025
In llvm/llvm-project#150248 LLVM removed the size parameter from the lifetime format. Tolerate not having that size parameter.
maurer
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In llvm/llvm-project#150248 LLVM removed the size parameter from the lifetime format. Tolerate not having that size parameter.
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Now that #149310 has restricted lifetime intrinsics to only work on allocas, we can also drop the explicit size argument. Instead, the size is implied by the alloca.
This removes the ability to only mark a prefix of an alloca alive/dead. We never used that capability, so we should remove the need to handle that possibility everywhere (though many key places, including stack coloring, did not actually respect this).