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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-05-20 06:38:37 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-05-20 06:38:37 +0000 |
| commit | ee0d5d4398fb855c6674da94d902ef45e944f375 (patch) | |
| tree | 479d41d9f92def17e6b1ebbb8a381183a3181fad | |
| parent | 8e86929e3ce3fe56295d2704b93bf14c709b311a (diff) | |
| download | llvm-ee0d5d4398fb855c6674da94d902ef45e944f375.tar.gz llvm-ee0d5d4398fb855c6674da94d902ef45e944f375.tar.bz2 llvm-ee0d5d4398fb855c6674da94d902ef45e944f375.tar.xz | |
Properly constrain register classes for sub-registers.
Not all GR64 registers have sub_8bit sub-registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157150 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/SelectionDAG/FastISel.cpp | 2 | ||||
| -rw-r--r-- | test/CodeGen/X86/fast-isel.ll | 4 |
2 files changed, 4 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp index 0c1ac6982d..07687ef8b5 100644 --- a/lib/CodeGen/SelectionDAG/FastISel.cpp +++ b/lib/CodeGen/SelectionDAG/FastISel.cpp @@ -1345,6 +1345,8 @@ unsigned FastISel::FastEmitInst_extractsubreg(MVT RetVT, unsigned ResultReg = createResultReg(TLI.getRegClassFor(RetVT)); assert(TargetRegisterInfo::isVirtualRegister(Op0) && "Cannot yet extract from physregs"); + const TargetRegisterClass *RC = MRI.getRegClass(Op0); + MRI.constrainRegClass(Op0, TRI.getSubClassWithSubReg(RC, Idx)); BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), ResultReg) .addReg(Op0, getKillRegState(Op0IsKill), Idx); diff --git a/test/CodeGen/X86/fast-isel.ll b/test/CodeGen/X86/fast-isel.ll index c88d52968d..9d9a520c6a 100644 --- a/test/CodeGen/X86/fast-isel.ll +++ b/test/CodeGen/X86/fast-isel.ll @@ -1,5 +1,5 @@ -; RUN: llc < %s -fast-isel -fast-isel-abort -march=x86 -mattr=sse2 -; RUN: llc < %s -fast-isel -fast-isel-abort -mtriple=x86_64-apple-darwin10 +; RUN: llc < %s -fast-isel -fast-isel-abort -verify-machineinstrs -march=x86 -mattr=sse2 +; RUN: llc < %s -fast-isel -fast-isel-abort -verify-machineinstrs -mtriple=x86_64-apple-darwin10 ; This tests very minimal fast-isel functionality. |