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| author | Bill Wendling <isanbard@gmail.com> | 2011-10-10 07:24:23 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2011-10-10 07:24:23 +0000 |
| commit | 8129d213960bac2c9d01053922866fc0f552462e (patch) | |
| tree | 598a53745aa6a4daa1893e691735f96b84b86c17 | |
| parent | 1f104804bf30f1457e92fa6ee958a618a958b1ad (diff) | |
| download | external_llvm-8129d213960bac2c9d01053922866fc0f552462e.zip external_llvm-8129d213960bac2c9d01053922866fc0f552462e.tar.gz external_llvm-8129d213960bac2c9d01053922866fc0f552462e.tar.bz2 | |
When getting the number of bits necessary for addressing mode
ARMII::AddrModeT1_s, we need to take into account that if the frame register is
ARM::SP, then the number of bits is 8. If it's not ARM::SP, then the number of
bits is 5.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141529 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/ARM/ARMBaseRegisterInfo.cpp | 13 | ||||
| -rw-r--r-- | test/CodeGen/Thumb/vargs.ll | 2 |
2 files changed, 12 insertions, 3 deletions
diff --git a/lib/Target/ARM/ARMBaseRegisterInfo.cpp b/lib/Target/ARM/ARMBaseRegisterInfo.cpp index 7c42342..0c8480d 100644 --- a/lib/Target/ARM/ARMBaseRegisterInfo.cpp +++ b/lib/Target/ARM/ARMBaseRegisterInfo.cpp @@ -1109,11 +1109,20 @@ bool ARMBaseRegisterInfo::isFrameOffsetLegal(const MachineInstr *MI, case ARMII::AddrMode3: NumBits = 8; break; - case ARMII::AddrModeT1_s: - NumBits = 5; + case ARMII::AddrModeT1_s: { + const MachineBasicBlock &MBB = *MI->getParent(); + const MachineFunction &MF = *MBB.getParent(); + unsigned FrameReg = ARM::SP; + if (MF.getFrameInfo()->hasVarSizedObjects()) + // There are alloca()'s in this function, must reference off the frame + // pointer or base pointer instead. + FrameReg = (!hasBasePointer(MF) ?BasePtr : getFrameRegister(MF)); + + NumBits = (FrameReg == ARM::SP) ? 8 : 5; Scale = 4; isSigned = false; break; + } default: llvm_unreachable("Unsupported addressing mode!"); break; diff --git a/test/CodeGen/Thumb/vargs.ll b/test/CodeGen/Thumb/vargs.ll index c2ba208..16a9c44 100644 --- a/test/CodeGen/Thumb/vargs.ll +++ b/test/CodeGen/Thumb/vargs.ll @@ -1,5 +1,5 @@ ; RUN: llc < %s -march=thumb -; RUN: llc < %s -mtriple=thumb-linux | grep pop | count 2 +; RUN: llc < %s -mtriple=thumb-linux | grep pop | count 1 ; RUN: llc < %s -mtriple=thumb-darwin | grep pop | count 2 @str = internal constant [4 x i8] c"%d\0A\00" ; <[4 x i8]*> [#uses=1] |