From 2e95afa04cd1c89de7e4abaeead66cd8e51ec929 Mon Sep 17 00:00:00 2001 From: Hal Finkel Date: Fri, 30 Dec 2011 00:34:00 +0000 Subject: Cleanup stack/frame register define/kill states. This fixes two bugs: 1. The ST*UX instructions that store and update the stack pointer did not set define/kill on R1. This became a problem when I activated post-RA scheduling (and had incorrectly adjusted the Frames-large test). 2. eliminateFrameIndex did not kill its scavenged temporary register, and this could cause the scavenger to exhaust all available registers (and its emergency spill slot) when there were a lot of CR values to spill. The 2010-02-12-saveCR test has been adjusted to check for this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147359 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/PowerPC/PPCFrameLowering.cpp | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) (limited to 'lib/Target/PowerPC/PPCFrameLowering.cpp') diff --git a/lib/Target/PowerPC/PPCFrameLowering.cpp b/lib/Target/PowerPC/PPCFrameLowering.cpp index 5c45018eba..09de47fe8b 100644 --- a/lib/Target/PowerPC/PPCFrameLowering.cpp +++ b/lib/Target/PowerPC/PPCFrameLowering.cpp @@ -367,8 +367,8 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF) const { .addReg(PPC::R0, RegState::Kill) .addImm(NegFrameSize); BuildMI(MBB, MBBI, dl, TII.get(PPC::STWUX)) - .addReg(PPC::R1) - .addReg(PPC::R1) + .addReg(PPC::R1, RegState::Kill) + .addReg(PPC::R1, RegState::Define) .addReg(PPC::R0); } else if (isInt<16>(NegFrameSize)) { BuildMI(MBB, MBBI, dl, TII.get(PPC::STWU), PPC::R1) @@ -382,8 +382,8 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF) const { .addReg(PPC::R0, RegState::Kill) .addImm(NegFrameSize & 0xFFFF); BuildMI(MBB, MBBI, dl, TII.get(PPC::STWUX)) - .addReg(PPC::R1) - .addReg(PPC::R1) + .addReg(PPC::R1, RegState::Kill) + .addReg(PPC::R1, RegState::Define) .addReg(PPC::R0); } } else { // PPC64. @@ -400,8 +400,8 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF) const { .addReg(PPC::X0) .addImm(NegFrameSize); BuildMI(MBB, MBBI, dl, TII.get(PPC::STDUX)) - .addReg(PPC::X1) - .addReg(PPC::X1) + .addReg(PPC::X1, RegState::Kill) + .addReg(PPC::X1, RegState::Define) .addReg(PPC::X0); } else if (isInt<16>(NegFrameSize)) { BuildMI(MBB, MBBI, dl, TII.get(PPC::STDU), PPC::X1) @@ -415,8 +415,8 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF) const { .addReg(PPC::X0, RegState::Kill) .addImm(NegFrameSize & 0xFFFF); BuildMI(MBB, MBBI, dl, TII.get(PPC::STDUX)) - .addReg(PPC::X1) - .addReg(PPC::X1) + .addReg(PPC::X1, RegState::Kill) + .addReg(PPC::X1, RegState::Define) .addReg(PPC::X0); } } -- cgit v1.2.3-70-g09d2