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Chris Lattner
14723c264d
constant fold FP_ROUND_INREG, ZERO_EXTEND_INREG, and SIGN_EXTEND_INREG
This allows the alpha backend to compile: bool %test(uint %P) { %c = seteq uint %P, 0 ret bool %c } into: test: ldgp $29, 0($27) ZAP $16,240,$0 CMPEQ $0,0,$0 AND $0,1,$0 ret $31,($26),1 instead of: test: ldgp $29, 0($27) ZAP $16,240,$0 ldiq $1,0 ZAP $1,240,$1 CMPEQ $0,$1,$0 AND $0,1,$0 ret $31,($26),1 ... and fixes PR534. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20534 91177308-0d34-0410-b5e6-96231b3b80d8
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