llvm-project

Commit Graph

Author	SHA1	Message	Date
Matt Arsenault	02907f3039	InstCombine: Fix assert when reassociating fsub with undef There is logic to track the expected number of instructions produced. It thought in this case an instruction would be necessary to negate the result, but here it folded into a ConstantExpr fneg when the non-undef value operand was cancelled out by the second fsub. I'm not sure why we don't fold constant FP ops with undef currently, but I think that would also avoid this problem. llvm-svn: 301199	2017-04-24 17:24:37 +00:00
Bill Wendling	3fbf36d0b4	Reduce fsub-fadd.ll and merge it into fsub-fsub.ll. Rename fsub-fsub.ll to fsub.ll and FileCheckify it. llvm-svn: 93669	2010-01-17 00:21:21 +00:00

Author

SHA1

Message

Date

Matt Arsenault

02907f3039

InstCombine: Fix assert when reassociating fsub with undef

There is logic to track the expected number of instructions
produced. It thought in this case an instruction would
be necessary to negate the result, but here it folded
into a ConstantExpr fneg when the non-undef value operand
was cancelled out by the second fsub.

I'm not sure why we don't fold constant FP ops with undef currently,
but I think that would also avoid this problem.

llvm-svn: 301199

2017-04-24 17:24:37 +00:00

Bill Wendling

3fbf36d0b4

Reduce fsub-fadd.ll and merge it into fsub-fsub.ll. Rename fsub-fsub.ll to

fsub.ll and FileCheckify it.

llvm-svn: 93669

2010-01-17 00:21:21 +00:00

2 Commits