tree 443f75ec2f225852f6c866412dbcfe28020b0125
parent 47c3ca108898a479ebfbba5642f21ad792a36a9e
author Nicolas Capens <capn@google.com> 1604372694 -0500
committer Nicolas Capens <nicolascapens@google.com> 1604479881 +0000

Fix LLVM alloca array size type

https://llvm.org/docs/LangRef.html#alloca-instruction does not specify
the type of the 'NumElements' parameter explicitly, but it is multiplied
by sizeof(<type>), which itself is of type size_t and thus 64-bit on
a 64-bit platform. This assumption is made by MemorySanitizer when it
emits instructions corresponding to this multiplication, which get
constant folded and requires both operands to be of the same bit size.

Bug: b/155148722
Change-Id: I432e69bfcea4d40ce7b593637fd242bc1a25a714
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/49888
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>