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SystemZ really does mean "has calls" and not just "adjusts stack." Go ahead and

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replace the check with the appropriate predicate. Modify the testcase to reflect
the correct code. (It should be saving callee-saved registers on the stack
allocated by the calling fuction.)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103829 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2010-05-14 22:17:42 +00:00
parent efa155fd6e
commit 23ead99283
2 changed files with 8 additions and 6 deletions
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10
lib/Target/SystemZ/SystemZRegisterInfo.cpp
View File

@ -102,7 +102,7 @@ int SystemZRegisterInfo::getFrameIndexOffset(const MachineFunction &MF,
Offset += StackSize - TFI.getOffsetOfLocalArea();
// Skip the register save area if we generated the stack frame.
if (StackSize || MFI->adjustsStack())
if (StackSize || MFI->hasCalls())
Offset -= TFI.getOffsetOfLocalArea();
return Offset;
@ -163,14 +163,14 @@ SystemZRegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
for (unsigned i = 0, e = array_lengthof(HighFPRs); i != e; ++i)
HighFPRsUsed |= MRI.isPhysRegUsed(HighFPRs[i]);
if (FFI->adjustsStack())
if (FFI->hasCalls())
/* FIXME: function is varargs */
/* FIXME: function grabs RA */
/* FIXME: function calls eh_return */
MRI.setPhysRegUsed(SystemZ::R14D);
if (HighFPRsUsed ||
FFI->adjustsStack() ||
FFI->hasCalls() ||
FFI->getObjectIndexEnd() != 0 || // Contains automatic variables
FFI->hasVarSizedObjects() // Function calls dynamic alloca's
/* FIXME: function is varargs */)
@ -234,7 +234,7 @@ void SystemZRegisterInfo::emitPrologue(MachineFunction &MF) const {
DL = MBBI->getDebugLoc();
// adjust stack pointer: R15 -= numbytes
if (StackSize || MFI->adjustsStack()) {
if (StackSize || MFI->hasCalls()) {
assert(MF.getRegInfo().isPhysRegUsed(SystemZ::R15D) &&
"Invalid stack frame calculation!");
emitSPUpdate(MBB, MBBI, -(int64_t)NumBytes, TII);
@ -286,7 +286,7 @@ void SystemZRegisterInfo::emitEpilogue(MachineFunction &MF,
// During callee-saved restores emission stack frame was not yet finialized
// (and thus - the stack size was unknown). Tune the offset having full stack
// size in hands.
if (StackSize || MFI->adjustsStack()) {
if (StackSize || MFI->hasCalls()) {
assert((MBBI->getOpcode() == SystemZ::MOV64rmm ||
MBBI->getOpcode() == SystemZ::MOV64rm) &&
"Expected to see callee-save register restore code");

4
test/CodeGen/SystemZ/2009-07-10-BadIncomingArgOffset.ll
View File

@ -1,4 +1,4 @@
; RUN: llc < %s | grep 168
; RUN: llc < %s | FileCheck %s
target datalayout = "E-p:64:64:64-i8:8:16-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-a0:16:16"
target triple = "s390x-linux"
@ -8,6 +8,8 @@ declare void @rdft(i32 signext, i32 signext, double*, i32* nocapture, double*) n
declare double @mp_mul_d2i_test(i32 signext, i32 signext, double* nocapture) nounwind
define void @mp_mul_radix_test_bb3(i32 %radix, i32 %nfft, double* %tmpfft, i32* %ip, double* %w, double* %arrayidx44.reload, double* %call.out) nounwind {
; CHECK: lg %r11, 328(%r15)
newFuncRoot:
br label %bb3