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Mirror of https://github.com/RPCS3/llvm-mirror
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SelectionDAGBuilder was inconsistently mangling values based on ABI Calling Conventions when getting them through copyFromRegs in SelectionDAGBuilder, causing duplicate value type convertions for function arguments. The checking for the mangling requirement was based on the value's originating instruction and was performed outside of, and inspite of, the regular Calling Convention Lowering. The issue could be observed in a scenario such as: ``` %arg1 = load half, half* %const, align 2 %arg2 = call fastcc half @someFunc() call fastcc void @otherFunc(half %arg1, half %arg2) ; Here, %arg2 was incorrectly mangled twice, as the CallConv data from ; the call to @someFunc() was taken into consideration for the check ; when getting the value for processing the call to @otherFunc(...), ; after the proper convertion had taken place when lowering the return ; value of the first call. ``` This patch fixes the issue by disregarding the Calling Convention information for such copyFromRegs, making sure the ABI mangling is properly contanined in the Calling Convention Lowering. This fixes Bugzilla #47454. Reviewed By: efriedma Differential Revision: https://reviews.llvm.org/D87844 (cherry picked from commit 53d238a961d14eae46f6f2b296ce48026c7bd0a1) |
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| llvm.spec.in | ||
| LLVMBuild.txt | ||
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| RELEASE_TESTERS.TXT | ||
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