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[SCCP] Zap multiple return values.

Description

[SCCP] Zap multiple return values.

We can replace the return values with undef if we replaced all
the call uses with a constant/undef.

Differential Revision: https://reviews.llvm.org/D22336

Details

Committed
davideJul 20 2016, 1:17 PM
Differential Revision
D22336: [SCCP] zap multiple return values
Parents
rL276173: [ELF][MIPS] Create PLT entry specific for MIPS ABI version R6
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