From 7e56831a6804812b2295c5446a05f4ec457b6b3e Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Thu, 15 Dec 2011 16:48:55 +0000 Subject: Synthesize missing register class intersections. The function TRI::getCommonSubClass(A, B) returns the largest common sub-class of the register classes A and B. This patch teaches TableGen to synthesize sub-classes such that the answer is always maximal. In other words, every register that is in both A and B will also be present in getCommonSubClass(A, B). This introduces these synthetic register classes: ARM: GPRnopc_and_hGPR GPRnopc_and_hGPR hGPR_and_rGPR GPRnopc_and_hGPR GPRnopc_and_hGPR hGPR_and_rGPR tGPR_and_tcGPR hGPR_and_tcGPR X86: GR32_NOAX_and_GR32_NOSP GR32_NOAX_and_GR32_NOREX GR64_NOSP_and_GR64_TC GR64_NOSP_and_GR64_TC GR64_NOREX_and_GR64_TC GR32_NOAX_and_GR32_NOSP GR32_NOAX_and_GR32_NOREX GR32_NOAX_and_GR32_NOREX_NOSP GR64_NOSP_and_GR64_TC GR64_NOREX_and_GR64_TC GR64_NOREX_NOSP_and_GR64_TC GR32_NOAX_and_GR32_NOSP GR32_NOAX_and_GR32_NOREX GR32_NOAX_and_GR32_NOREX_NOSP GR32_ABCD_and_GR32_NOAX GR32_NOAX_and_GR32_NOSP GR32_NOAX_and_GR32_NOREX GR32_NOAX_and_GR32_NOREX_NOSP GR32_ABCD_and_GR32_NOAX GR32_NOAX_and_GR32_TC GR32_NOAX_and_GR32_NOSP GR64_NOSP_and_GR64_TC GR32_NOAX_and_GR32_NOREX GR32_NOAX_and_GR32_NOREX_NOSP GR64_NOREX_and_GR64_TC GR64_NOREX_NOSP_and_GR64_TC GR32_ABCD_and_GR32_NOAX GR64_ABCD_and_GR64_TC GR32_NOAX_and_GR32_TC GR32_AD_and_GR32_NOAX Other targets are unaffected. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146657 91177308-0d34-0410-b5e6-96231b3b80d8 --- utils/TableGen/CodeGenRegisters.h | 1 + 1 file changed, 1 insertion(+) (limited to 'utils/TableGen/CodeGenRegisters.h') diff --git a/utils/TableGen/CodeGenRegisters.h b/utils/TableGen/CodeGenRegisters.h index b75bf0b8fd..da5cf10eab 100644 --- a/utils/TableGen/CodeGenRegisters.h +++ b/utils/TableGen/CodeGenRegisters.h @@ -244,6 +244,7 @@ namespace llvm { // Infer missing register classes. void computeInferredRegisterClasses(); + void inferCommonSubClass(CodeGenRegisterClass *RC); // Composite SubRegIndex instances. // Map (SubRegIndex, SubRegIndex) -> SubRegIndex. -- cgit v1.2.3