From acfa5a203c01d99aac1bdc1e045c08153bcdbbf6 Mon Sep 17 00:00:00 2001 From: Daniel Sanders Date: Tue, 24 Sep 2013 13:33:07 +0000 Subject: [mips][msa] Remove the VSPLAT and VSPLATD nodes in favour of matching BUILD_VECTOR. Most constant BUILD_VECTOR's are matched using ComplexPatterns which cover bitcasted as well as normal vectors. However, it doesn't seem to be possible to match ldi.[bhwd] in a type-agnostic manner (e.g. to support the widest range of immediates, it should be possible to use ldi.b to load v2i64) using TableGen so ldi.[bhwd] is matched using custom code in MipsSEISelDAGToDAG.cpp This made the majority of the constant splat BUILD_VECTOR lowering redundant. The only transformation remaining for constant splats is when an (up-to) 32-bit constant splat is possible but the value does not fit into a 10-bit signed integer. In this case, the BUILD_VECTOR is transformed into a bitcasted BUILD_VECTOR so that fill.[bhw] can be used to splat the vector from a GPR32 register (which is initialized using the usual lui/addui sequence). There are no additional tests since this is a re-implementation of previous functionality. The change is intended to make it easier to implement some of the upcoming instruction selection patches since they can rely on existing support for BUILD_VECTOR's in the DAGCombiner. compare_float.ll changed slightly because a BITCAST is no longer introduced during legalization. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191299 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/Mips/MipsISelLowering.h | 6 ------ 1 file changed, 6 deletions(-) (limited to 'lib/Target/Mips/MipsISelLowering.h') diff --git a/lib/Target/Mips/MipsISelLowering.h b/lib/Target/Mips/MipsISelLowering.h index 0d588c1d2a..ae82e7e7ed 100644 --- a/lib/Target/Mips/MipsISelLowering.h +++ b/lib/Target/Mips/MipsISelLowering.h @@ -172,12 +172,6 @@ namespace llvm { VUMAX, VUMIN, - // Special case of BUILD_VECTOR where all elements are the same. - VSPLAT, - // Special case of VSPLAT where the result is v2i64, the operand is - // constant, and the operand fits in a signed 10-bits value. - VSPLATD, - // Combined (XOR (OR $a, $b), -1) VNOR, -- cgit v1.2.3