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[SystemZ] Save/restore r6 and r7 if function contains landing pad.

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This fixes PR27102.

Differential Revision: http://reviews.llvm.org/D18541

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274017 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marcin Koscielnicki 2016-06-28 14:13:11 +00:00
parent 93497543cc
commit 6a26759b4c
2 changed files with 9 additions and 1 deletions
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6
lib/Target/SystemZ/SystemZFrameLowering.cpp
View File

@ -81,6 +81,12 @@ void SystemZFrameLowering::determineCalleeSaves(MachineFunction &MF,
for (unsigned I = MFI->getVarArgsFirstGPR(); I < SystemZ::NumArgGPRs; ++I)
SavedRegs.set(SystemZ::ArgGPRs[I]);
// If there are any landing pads, entering them will modify r6/r7.
if (!MF.getMMI().getLandingPads().empty()) {
SavedRegs.set(SystemZ::R6D);
SavedRegs.set(SystemZ::R7D);
}
// If the function requires a frame pointer, record that the hard
// frame pointer will be clobbered.
if (HasFP)

4
test/DebugInfo/SystemZ/eh_frame_personality.ll
View File

@ -20,7 +20,9 @@ clean:
; CHECK-FUNC: .cfi_startproc
; CHECK-FUNC: .cfi_personality 0, __gxx_personality_v0
; CHECK-FUNC: .cfi_lsda 0, .Lexception0
; CHECK-FUNC: stmg %r14, %r15, 112(%r15)
; CHECK-FUNC: stmg %r6, %r15, 48(%r15)
; CHECK-FUNC: .cfi_offset %r6, -112
; CHECK-FUNC: .cfi_offset %r7, -104
; CHECK-FUNC: .cfi_offset %r14, -48
; CHECK-FUNC: .cfi_offset %r15, -40
; CHECK-FUNC: aghi %r15, -160