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[PowerPC] Utilize getReservedRegs to find asm clobberable registers. (#107863)
This patch utilizes getReservedRegs() to find asm clobberable registers. And to make the result of getReservedRegs() accurate, this patch implements the todo, which is to make r2 allocatable on AIX for some leaf functions.
1 parent d3d8103 commit 2cd3213

13 files changed

+183
-139
lines changed

‎llvm/lib/Target/PowerPC/PPCFrameLowering.cpp

Lines changed: 8 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -2771,6 +2771,14 @@ void PPCFrameLowering::updateCalleeSaves(const MachineFunction &MF,
27712771
MCPhysReg Cand = CSRegs[i];
27722772
if (!SavedRegs.test(Cand))
27732773
continue;
2774+
// When R2/X2 is a CSR and not used for passing arguments, it is allocated
2775+
// earlier than other volatile registers. R2/X2 is not contiguous with
2776+
// R13/X13 to R31/X31.
2777+
if (Cand == PPC::X2 || Cand == PPC::R2) {
2778+
SavedRegs.set(Cand);
2779+
continue;
2780+
}
2781+
27742782
if (PPC::GPRCRegClass.contains(Cand) && Cand < LowestGPR)
27752783
LowestGPR = Cand;
27762784
else if (PPC::G8RCRegClass.contains(Cand) && Cand < LowestG8R)

‎llvm/lib/Target/PowerPC/PPCISelLowering.cpp

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -3437,6 +3437,10 @@ SDValue PPCTargetLowering::LowerGlobalTLSAddressAIX(SDValue Op,
34373437
if (Subtarget.hasAIXShLibTLSModelOpt())
34383438
updateForAIXShLibTLSModelOpt(Model, DAG, getTargetMachine());
34393439

3440+
// TLS variables are accessed through TOC entries.
3441+
// To support this, set the DAG to use the TOC base pointer.
3442+
setUsesTOCBasePtr(DAG);
3443+
34403444
bool IsTLSLocalExecModel = Model == TLSModel::LocalExec;
34413445

34423446
if (IsTLSLocalExecModel || Model == TLSModel::InitialExec) {

‎llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp

Lines changed: 14 additions & 18 deletions
Original file line numberDiff line numberDiff line change
@@ -380,23 +380,21 @@ BitVector PPCRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
380380

381381
markSuperRegs(Reserved, PPC::VRSAVE);
382382

383+
const PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
384+
bool UsesTOCBasePtr = FuncInfo->usesTOCBasePtr();
383385
// The SVR4 ABI reserves r2 and r13
384-
if (Subtarget.isSVR4ABI()) {
386+
if (Subtarget.isSVR4ABI() || Subtarget.isAIXABI()) {
385387
// We only reserve r2 if we need to use the TOC pointer. If we have no
386388
// explicit uses of the TOC pointer (meaning we're a leaf function with
387389
// no constant-pool loads, etc.) and we have no potential uses inside an
388390
// inline asm block, then we can treat r2 has an ordinary callee-saved
389391
// register.
390-
const PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
391-
if (!TM.isPPC64() || FuncInfo->usesTOCBasePtr() || MF.hasInlineAsm())
392-
markSuperRegs(Reserved, PPC::R2); // System-reserved register
393-
markSuperRegs(Reserved, PPC::R13); // Small Data Area pointer register
394-
}
392+
if (!TM.isPPC64() || UsesTOCBasePtr || MF.hasInlineAsm())
393+
markSuperRegs(Reserved, PPC::R2); // System-reserved register.
395394

396-
// Always reserve r2 on AIX for now.
397-
// TODO: Make r2 allocatable on AIX/XCOFF for some leaf functions.
398-
if (Subtarget.isAIXABI())
399-
markSuperRegs(Reserved, PPC::R2); // System-reserved register
395+
if (Subtarget.isSVR4ABI())
396+
markSuperRegs(Reserved, PPC::R13); // Small Data Area pointer register.
397+
}
400398

401399
// On PPC64, r13 is the thread pointer. Never allocate this register.
402400
if (TM.isPPC64())
@@ -441,14 +439,12 @@ BitVector PPCRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
441439

442440
bool PPCRegisterInfo::isAsmClobberable(const MachineFunction &MF,
443441
MCRegister PhysReg) const {
444-
// We cannot use getReservedRegs() to find the registers that are not asm
445-
// clobberable because there are some reserved registers which can be
446-
// clobbered by inline asm. For example, when LR is clobbered, the register is
447-
// saved and restored. We will hardcode the registers that are not asm
448-
// cloberable in this function.
449-
450-
// The stack pointer (R1/X1) is not clobberable by inline asm
451-
return PhysReg != PPC::R1 && PhysReg != PPC::X1;
442+
// CTR and LR registers are always reserved, but they are asm clobberable.
443+
if (PhysReg == PPC::CTR || PhysReg == PPC::CTR8 || PhysReg == PPC::LR ||
444+
PhysReg == PPC::LR8)
445+
return true;
446+
447+
return !getReservedRegs(MF).test(PhysReg);
452448
}
453449

454450
bool PPCRegisterInfo::requiresFrameIndexScavenging(const MachineFunction &MF) const {

‎llvm/test/CodeGen/PowerPC/aix-cc-abi-mir.ll

Lines changed: 7 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -1146,11 +1146,11 @@ define i64 @test_ints_stack(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6
11461146
; 64BIT-NEXT: renamable $r11 = LWZ 0, %fixed-stack.1, implicit-def $x11 :: (load (s32) from %fixed-stack.1)
11471147
; 64BIT-NEXT: renamable $x12 = LWZ8 0, %fixed-stack.4 :: (load (s32) from %fixed-stack.4)
11481148
; 64BIT-NEXT: renamable $x0 = LWA 0, %fixed-stack.0 :: (load (s32) from %fixed-stack.0)
1149-
; 64BIT-NEXT: renamable $x31 = LD 0, %fixed-stack.2 :: (load (s64) from %fixed-stack.2)
1150-
; 64BIT-NEXT: renamable $x30 = LWA 0, %fixed-stack.3 :: (load (s32) from %fixed-stack.3)
1151-
; 64BIT-NEXT: renamable $r29 = LWZ 0, %fixed-stack.5, implicit-def $x29 :: (load (s32) from %fixed-stack.5)
1152-
; 64BIT-NEXT: renamable $x28 = LWA 0, %fixed-stack.6 :: (load (s32) from %fixed-stack.6)
1153-
; 64BIT-NEXT: renamable $x27 = LD 0, %fixed-stack.7 :: (load (s64) from %fixed-stack.7, align 16)
1149+
; 64BIT-NEXT: renamable $x2 = LD 0, %fixed-stack.2 :: (load (s64) from %fixed-stack.2)
1150+
; 64BIT-NEXT: renamable $x31 = LWA 0, %fixed-stack.3 :: (load (s32) from %fixed-stack.3)
1151+
; 64BIT-NEXT: renamable $r30 = LWZ 0, %fixed-stack.5, implicit-def $x30 :: (load (s32) from %fixed-stack.5)
1152+
; 64BIT-NEXT: renamable $x29 = LWA 0, %fixed-stack.6 :: (load (s32) from %fixed-stack.6)
1153+
; 64BIT-NEXT: renamable $x28 = LD 0, %fixed-stack.7 :: (load (s64) from %fixed-stack.7, align 16)
11541154
; 64BIT-NEXT: renamable $r3 = nsw ADD4 renamable $r3, renamable $r4, implicit killed $x4, implicit killed $x3
11551155
; 64BIT-NEXT: renamable $r3 = nsw ADD4 killed renamable $r3, renamable $r5, implicit killed $x5
11561156
; 64BIT-NEXT: renamable $r3 = nsw ADD4 killed renamable $r3, renamable $r6, implicit killed $x6
@@ -1159,12 +1159,12 @@ define i64 @test_ints_stack(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6
11591159
; 64BIT-NEXT: renamable $r3 = nsw ADD4 killed renamable $r3, renamable $r9, implicit killed $x9
11601160
; 64BIT-NEXT: renamable $r3 = nsw ADD4 killed renamable $r3, renamable $r10, implicit killed $x10
11611161
; 64BIT-NEXT: renamable $x3 = EXTSW_32_64 killed renamable $r3
1162-
; 64BIT-NEXT: renamable $x3 = nsw ADD8 killed renamable $x3, killed renamable $x27
11631162
; 64BIT-NEXT: renamable $x3 = nsw ADD8 killed renamable $x3, killed renamable $x28
11641163
; 64BIT-NEXT: renamable $x3 = nsw ADD8 killed renamable $x3, killed renamable $x29
1165-
; 64BIT-NEXT: renamable $x3 = nsw ADD8 killed renamable $x3, killed renamable $x12
11661164
; 64BIT-NEXT: renamable $x3 = nsw ADD8 killed renamable $x3, killed renamable $x30
1165+
; 64BIT-NEXT: renamable $x3 = nsw ADD8 killed renamable $x3, killed renamable $x12
11671166
; 64BIT-NEXT: renamable $x3 = nsw ADD8 killed renamable $x3, killed renamable $x31
1167+
; 64BIT-NEXT: renamable $x3 = nsw ADD8 killed renamable $x3, killed renamable $x2
11681168
; 64BIT-NEXT: renamable $x3 = nsw ADD8 killed renamable $x3, killed renamable $x11
11691169
; 64BIT-NEXT: renamable $x3 = nsw ADD8 killed renamable $x3, killed renamable $x0
11701170
; 64BIT-NEXT: BLR8 implicit $lr8, implicit $rm, implicit $x3

‎llvm/test/CodeGen/PowerPC/aix-cc-abi.ll

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -1240,19 +1240,19 @@ define i64 @test_ints_stack(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6
12401240
; ASM64PWR4-NEXT: lwz 5, 132(1)
12411241
; ASM64PWR4-NEXT: add 3, 3, 4
12421242
; ASM64PWR4-NEXT: add 3, 3, 12
1243-
; ASM64PWR4-NEXT: std 31, -8(1) # 8-byte Folded Spill
1243+
; ASM64PWR4-NEXT: std 2, -8(1) # 8-byte Folded Spill
12441244
; ASM64PWR4-NEXT: add 3, 3, 5
1245-
; ASM64PWR4-NEXT: lwz 31, 140(1)
1245+
; ASM64PWR4-NEXT: lwz 2, 140(1)
12461246
; ASM64PWR4-NEXT: lwa 11, 148(1)
1247-
; ASM64PWR4-NEXT: add 3, 3, 31
1247+
; ASM64PWR4-NEXT: add 3, 3, 2
12481248
; ASM64PWR4-NEXT: add 3, 3, 11
12491249
; ASM64PWR4-NEXT: ld 4, 152(1)
12501250
; ASM64PWR4-NEXT: lwz 0, 164(1)
12511251
; ASM64PWR4-NEXT: add 3, 3, 4
12521252
; ASM64PWR4-NEXT: lwa 5, 172(1)
12531253
; ASM64PWR4-NEXT: add 3, 3, 0
12541254
; ASM64PWR4-NEXT: add 3, 3, 5
1255-
; ASM64PWR4-NEXT: ld 31, -8(1) # 8-byte Folded Reload
1255+
; ASM64PWR4-NEXT: ld 2, -8(1) # 8-byte Folded Reload
12561256
; ASM64PWR4-NEXT: blr
12571257
entry:
12581258
%add = add nsw i32 %i1, %i2

‎llvm/test/CodeGen/PowerPC/aix-inline-asm-clobber-warning.ll

Lines changed: 15 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,15 @@
1+
; RUN: llc < %s -mtriple=powerpc-unknown-aix-xcoff -verify-machineinstrs \
2+
; RUN: -mcpu=pwr7 -mattr=+altivec -O0 2>&1 | FileCheck %s
3+
; RUN: llc < %s -mtriple=powerpc64-unknown-aix-xcoff -verify-machineinstrs \
4+
; RUN: -mcpu=pwr7 -mattr=+altivec -O0 2>&1 | FileCheck %s
5+
6+
; CHECK: warning: inline asm clobber list contains reserved registers: R2
7+
; CHECK-NEXT: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
8+
9+
@a = external global i32, align 4
10+
11+
define void @bar() {
12+
store i32 0, ptr @a, align 4
13+
call void asm sideeffect "li 2, 1", "~{r2}"()
14+
ret void
15+
}

‎llvm/test/CodeGen/PowerPC/aix64-csr-alloc.mir

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -17,6 +17,5 @@ body: |
1717
BLR8 implicit $lr8, implicit undef $rm, implicit $x3, implicit $f1
1818
...
1919
# CHECK-DAG: AllocationOrder(VFRC) = [ $vf2 $vf3 $vf4 $vf5 $vf0 $vf1 $vf6 $vf7 $vf8 $vf9 $vf10 $vf11 $vf12 $vf13 $vf14 $vf15 $vf16 $vf17 $vf18 $vf19 $vf31 $vf30 $vf29 $vf28 $vf27 $vf26 $vf25 $vf24 $vf23 $vf22 $vf21 $vf20 ]
20-
# CHECK-DAG: AllocationOrder(G8RC_and_G8RC_NOX0) = [ $x3 $x4 $x5 $x6 $x7 $x8 $x9 $x10 $x11 $x12 $x31 $x30 $x29 $x28 $x27 $x26 $x25 $x24 $x23 $x22 $x21 $x20 $x19 $x18 $x17 $x16 $x15 $x1
21-
# CHECK-DAG: 4 ]
20+
# CHECK-DAG: AllocationOrder(G8RC_and_G8RC_NOX0) = [ $x3 $x4 $x5 $x6 $x7 $x8 $x9 $x10 $x11 $x12 $x2 $x31 $x30 $x29 $x28 $x27 $x26 $x25 $x24 $x23 $x22 $x21 $x20 $x19 $x18 $x17 $x16 $x15 $x14 ]
2221
# CHECK-DAG: AllocationOrder(F8RC) = [ $f0 $f1 $f2 $f3 $f4 $f5 $f6 $f7 $f8 $f9 $f10 $f11 $f12 $f13 $f31 $f30 $f29 $f28 $f27 $f26 $f25 $f24 $f23 $f22 $f21 $f20 $f19 $f18 $f17 $f16 $f15 $f14 ]

‎llvm/test/CodeGen/PowerPC/inc-of-add.ll

Lines changed: 63 additions & 63 deletions
Original file line numberDiff line numberDiff line change
@@ -166,81 +166,81 @@ define <16 x i8> @vector_i128_i8(<16 x i8> %x, <16 x i8> %y) nounwind {
166166
;
167167
; AIX-PPC64-LABEL: vector_i128_i8:
168168
; AIX-PPC64: # %bb.0:
169-
; AIX-PPC64-NEXT: std 22, -80(1) # 8-byte Folded Spill
170-
; AIX-PPC64-NEXT: lbz 22, 207(1)
171169
; AIX-PPC64-NEXT: std 23, -72(1) # 8-byte Folded Spill
170+
; AIX-PPC64-NEXT: lbz 23, 207(1)
172171
; AIX-PPC64-NEXT: std 24, -64(1) # 8-byte Folded Spill
173-
; AIX-PPC64-NEXT: std 26, -48(1) # 8-byte Folded Spill
174172
; AIX-PPC64-NEXT: std 25, -56(1) # 8-byte Folded Spill
173+
; AIX-PPC64-NEXT: std 27, -40(1) # 8-byte Folded Spill
174+
; AIX-PPC64-NEXT: std 26, -48(1) # 8-byte Folded Spill
175+
; AIX-PPC64-NEXT: std 30, -16(1) # 8-byte Folded Spill
175176
; AIX-PPC64-NEXT: std 29, -24(1) # 8-byte Folded Spill
176177
; AIX-PPC64-NEXT: std 28, -32(1) # 8-byte Folded Spill
177-
; AIX-PPC64-NEXT: std 27, -40(1) # 8-byte Folded Spill
178+
; AIX-PPC64-NEXT: std 2, -80(1) # 8-byte Folded Spill
178179
; AIX-PPC64-NEXT: std 31, -8(1) # 8-byte Folded Spill
179-
; AIX-PPC64-NEXT: std 30, -16(1) # 8-byte Folded Spill
180-
; AIX-PPC64-NEXT: lbz 23, 199(1)
181-
; AIX-PPC64-NEXT: lbz 24, 191(1)
182-
; AIX-PPC64-NEXT: add 6, 22, 6
183-
; AIX-PPC64-NEXT: lbz 22, 231(1)
184-
; AIX-PPC64-NEXT: add 5, 23, 5
185-
; AIX-PPC64-NEXT: lbz 23, 223(1)
186-
; AIX-PPC64-NEXT: add 4, 24, 4
187-
; AIX-PPC64-NEXT: lbz 24, 215(1)
188-
; AIX-PPC64-NEXT: add 9, 22, 9
189-
; AIX-PPC64-NEXT: lbz 26, 127(1)
190-
; AIX-PPC64-NEXT: add 8, 23, 8
191-
; AIX-PPC64-NEXT: lbz 22, 255(1)
192-
; AIX-PPC64-NEXT: add 7, 24, 7
193-
; AIX-PPC64-NEXT: lbz 25, 119(1)
180+
; AIX-PPC64-NEXT: lbz 24, 199(1)
181+
; AIX-PPC64-NEXT: lbz 25, 191(1)
182+
; AIX-PPC64-NEXT: add 6, 23, 6
183+
; AIX-PPC64-NEXT: lbz 23, 231(1)
184+
; AIX-PPC64-NEXT: add 5, 24, 5
185+
; AIX-PPC64-NEXT: lbz 24, 223(1)
186+
; AIX-PPC64-NEXT: add 4, 25, 4
187+
; AIX-PPC64-NEXT: lbz 25, 215(1)
188+
; AIX-PPC64-NEXT: add 9, 23, 9
189+
; AIX-PPC64-NEXT: lbz 27, 127(1)
190+
; AIX-PPC64-NEXT: add 8, 24, 8
191+
; AIX-PPC64-NEXT: lbz 23, 255(1)
192+
; AIX-PPC64-NEXT: add 7, 25, 7
193+
; AIX-PPC64-NEXT: lbz 26, 119(1)
194194
; AIX-PPC64-NEXT: addi 9, 9, 1
195-
; AIX-PPC64-NEXT: lbz 23, 247(1)
196-
; AIX-PPC64-NEXT: add 26, 22, 26
197-
; AIX-PPC64-NEXT: lbz 24, 239(1)
195+
; AIX-PPC64-NEXT: lbz 24, 247(1)
196+
; AIX-PPC64-NEXT: add 27, 23, 27
197+
; AIX-PPC64-NEXT: lbz 25, 239(1)
198198
; AIX-PPC64-NEXT: addi 8, 8, 1
199-
; AIX-PPC64-NEXT: lbz 29, 151(1)
200-
; AIX-PPC64-NEXT: add 25, 23, 25
201-
; AIX-PPC64-NEXT: lbz 22, 279(1)
202-
; AIX-PPC64-NEXT: add 10, 24, 10
203-
; AIX-PPC64-NEXT: lbz 28, 143(1)
199+
; AIX-PPC64-NEXT: lbz 30, 151(1)
200+
; AIX-PPC64-NEXT: add 26, 24, 26
201+
; AIX-PPC64-NEXT: lbz 23, 279(1)
202+
; AIX-PPC64-NEXT: add 10, 25, 10
203+
; AIX-PPC64-NEXT: lbz 29, 143(1)
204204
; AIX-PPC64-NEXT: addi 10, 10, 1
205-
; AIX-PPC64-NEXT: lbz 23, 271(1)
206-
; AIX-PPC64-NEXT: add 29, 22, 29
207-
; AIX-PPC64-NEXT: lbz 27, 135(1)
205+
; AIX-PPC64-NEXT: lbz 24, 271(1)
206+
; AIX-PPC64-NEXT: add 30, 23, 30
207+
; AIX-PPC64-NEXT: lbz 28, 135(1)
208208
; AIX-PPC64-NEXT: addi 7, 7, 1
209-
; AIX-PPC64-NEXT: lbz 24, 263(1)
210-
; AIX-PPC64-NEXT: add 28, 23, 28
209+
; AIX-PPC64-NEXT: lbz 25, 263(1)
210+
; AIX-PPC64-NEXT: add 29, 24, 29
211211
; AIX-PPC64-NEXT: lbz 11, 183(1)
212212
; AIX-PPC64-NEXT: addi 6, 6, 1
213-
; AIX-PPC64-NEXT: lbz 22, 311(1)
214-
; AIX-PPC64-NEXT: add 27, 24, 27
213+
; AIX-PPC64-NEXT: lbz 23, 311(1)
214+
; AIX-PPC64-NEXT: add 28, 25, 28
215215
; AIX-PPC64-NEXT: lbz 12, 175(1)
216216
; AIX-PPC64-NEXT: addi 5, 5, 1
217217
; AIX-PPC64-NEXT: lbz 0, 303(1)
218-
; AIX-PPC64-NEXT: add 11, 22, 11
219-
; AIX-PPC64-NEXT: lbz 31, 167(1)
218+
; AIX-PPC64-NEXT: add 11, 23, 11
219+
; AIX-PPC64-NEXT: lbz 2, 167(1)
220220
; AIX-PPC64-NEXT: addi 11, 11, 1
221-
; AIX-PPC64-NEXT: lbz 23, 295(1)
221+
; AIX-PPC64-NEXT: lbz 24, 295(1)
222222
; AIX-PPC64-NEXT: add 12, 0, 12
223-
; AIX-PPC64-NEXT: lbz 30, 159(1)
223+
; AIX-PPC64-NEXT: lbz 31, 159(1)
224224
; AIX-PPC64-NEXT: addi 4, 4, 1
225-
; AIX-PPC64-NEXT: lbz 24, 287(1)
226-
; AIX-PPC64-NEXT: add 31, 23, 31
225+
; AIX-PPC64-NEXT: lbz 25, 287(1)
226+
; AIX-PPC64-NEXT: add 2, 24, 2
227227
; AIX-PPC64-NEXT: stb 11, 15(3)
228228
; AIX-PPC64-NEXT: addi 11, 12, 1
229-
; AIX-PPC64-NEXT: add 30, 24, 30
229+
; AIX-PPC64-NEXT: add 31, 25, 31
230230
; AIX-PPC64-NEXT: stb 11, 14(3)
231-
; AIX-PPC64-NEXT: addi 11, 31, 1
231+
; AIX-PPC64-NEXT: addi 11, 2, 1
232232
; AIX-PPC64-NEXT: stb 11, 13(3)
233-
; AIX-PPC64-NEXT: addi 11, 30, 1
233+
; AIX-PPC64-NEXT: addi 11, 31, 1
234234
; AIX-PPC64-NEXT: stb 11, 12(3)
235-
; AIX-PPC64-NEXT: addi 11, 29, 1
235+
; AIX-PPC64-NEXT: addi 11, 30, 1
236236
; AIX-PPC64-NEXT: stb 11, 11(3)
237-
; AIX-PPC64-NEXT: addi 11, 28, 1
237+
; AIX-PPC64-NEXT: addi 11, 29, 1
238238
; AIX-PPC64-NEXT: stb 11, 10(3)
239-
; AIX-PPC64-NEXT: addi 11, 27, 1
239+
; AIX-PPC64-NEXT: addi 11, 28, 1
240240
; AIX-PPC64-NEXT: stb 11, 9(3)
241-
; AIX-PPC64-NEXT: addi 11, 26, 1
241+
; AIX-PPC64-NEXT: addi 11, 27, 1
242242
; AIX-PPC64-NEXT: stb 11, 8(3)
243-
; AIX-PPC64-NEXT: addi 11, 25, 1
243+
; AIX-PPC64-NEXT: addi 11, 26, 1
244244
; AIX-PPC64-NEXT: stb 11, 7(3)
245245
; AIX-PPC64-NEXT: stb 10, 6(3)
246246
; AIX-PPC64-NEXT: stb 9, 5(3)
@@ -249,6 +249,7 @@ define <16 x i8> @vector_i128_i8(<16 x i8> %x, <16 x i8> %y) nounwind {
249249
; AIX-PPC64-NEXT: stb 6, 2(3)
250250
; AIX-PPC64-NEXT: stb 5, 1(3)
251251
; AIX-PPC64-NEXT: stb 4, 0(3)
252+
; AIX-PPC64-NEXT: ld 2, -80(1) # 8-byte Folded Reload
252253
; AIX-PPC64-NEXT: ld 31, -8(1) # 8-byte Folded Reload
253254
; AIX-PPC64-NEXT: ld 30, -16(1) # 8-byte Folded Reload
254255
; AIX-PPC64-NEXT: ld 29, -24(1) # 8-byte Folded Reload
@@ -258,7 +259,6 @@ define <16 x i8> @vector_i128_i8(<16 x i8> %x, <16 x i8> %y) nounwind {
258259
; AIX-PPC64-NEXT: ld 25, -56(1) # 8-byte Folded Reload
259260
; AIX-PPC64-NEXT: ld 24, -64(1) # 8-byte Folded Reload
260261
; AIX-PPC64-NEXT: ld 23, -72(1) # 8-byte Folded Reload
261-
; AIX-PPC64-NEXT: ld 22, -80(1) # 8-byte Folded Reload
262262
; AIX-PPC64-NEXT: blr
263263
;
264264
; PPC64LE-LABEL: vector_i128_i8:
@@ -314,30 +314,30 @@ define <8 x i16> @vector_i128_i16(<8 x i16> %x, <8 x i16> %y) nounwind {
314314
;
315315
; AIX-PPC64-LABEL: vector_i128_i16:
316316
; AIX-PPC64: # %bb.0:
317-
; AIX-PPC64-NEXT: std 26, -48(1) # 8-byte Folded Spill
318317
; AIX-PPC64-NEXT: std 27, -40(1) # 8-byte Folded Spill
319318
; AIX-PPC64-NEXT: std 28, -32(1) # 8-byte Folded Spill
320319
; AIX-PPC64-NEXT: std 29, -24(1) # 8-byte Folded Spill
321320
; AIX-PPC64-NEXT: std 30, -16(1) # 8-byte Folded Spill
322321
; AIX-PPC64-NEXT: std 31, -8(1) # 8-byte Folded Spill
322+
; AIX-PPC64-NEXT: std 2, -48(1) # 8-byte Folded Spill
323323
; AIX-PPC64-NEXT: lhz 11, 118(1)
324324
; AIX-PPC64-NEXT: lhz 12, 182(1)
325325
; AIX-PPC64-NEXT: lhz 0, 174(1)
326-
; AIX-PPC64-NEXT: lhz 31, 166(1)
326+
; AIX-PPC64-NEXT: lhz 2, 166(1)
327327
; AIX-PPC64-NEXT: add 11, 12, 11
328-
; AIX-PPC64-NEXT: lhz 30, 158(1)
328+
; AIX-PPC64-NEXT: lhz 31, 158(1)
329329
; AIX-PPC64-NEXT: add 10, 0, 10
330-
; AIX-PPC64-NEXT: lhz 29, 142(1)
331-
; AIX-PPC64-NEXT: add 9, 31, 9
332-
; AIX-PPC64-NEXT: lhz 28, 126(1)
333-
; AIX-PPC64-NEXT: add 8, 30, 8
334-
; AIX-PPC64-NEXT: lhz 27, 134(1)
335-
; AIX-PPC64-NEXT: add 6, 29, 6
336-
; AIX-PPC64-NEXT: lhz 26, 150(1)
337-
; AIX-PPC64-NEXT: add 4, 28, 4
338-
; AIX-PPC64-NEXT: add 5, 27, 5
330+
; AIX-PPC64-NEXT: lhz 30, 142(1)
331+
; AIX-PPC64-NEXT: add 9, 2, 9
332+
; AIX-PPC64-NEXT: lhz 29, 126(1)
333+
; AIX-PPC64-NEXT: add 8, 31, 8
334+
; AIX-PPC64-NEXT: lhz 28, 134(1)
335+
; AIX-PPC64-NEXT: add 6, 30, 6
336+
; AIX-PPC64-NEXT: lhz 27, 150(1)
337+
; AIX-PPC64-NEXT: add 4, 29, 4
338+
; AIX-PPC64-NEXT: add 5, 28, 5
339339
; AIX-PPC64-NEXT: addi 11, 11, 1
340-
; AIX-PPC64-NEXT: add 7, 26, 7
340+
; AIX-PPC64-NEXT: add 7, 27, 7
341341
; AIX-PPC64-NEXT: addi 10, 10, 1
342342
; AIX-PPC64-NEXT: addi 9, 9, 1
343343
; AIX-PPC64-NEXT: addi 8, 8, 1
@@ -353,12 +353,12 @@ define <8 x i16> @vector_i128_i16(<8 x i16> %x, <8 x i16> %y) nounwind {
353353
; AIX-PPC64-NEXT: sth 6, 4(3)
354354
; AIX-PPC64-NEXT: sth 5, 2(3)
355355
; AIX-PPC64-NEXT: sth 4, 0(3)
356+
; AIX-PPC64-NEXT: ld 2, -48(1) # 8-byte Folded Reload
356357
; AIX-PPC64-NEXT: ld 31, -8(1) # 8-byte Folded Reload
357358
; AIX-PPC64-NEXT: ld 30, -16(1) # 8-byte Folded Reload
358359
; AIX-PPC64-NEXT: ld 29, -24(1) # 8-byte Folded Reload
359360
; AIX-PPC64-NEXT: ld 28, -32(1) # 8-byte Folded Reload
360361
; AIX-PPC64-NEXT: ld 27, -40(1) # 8-byte Folded Reload
361-
; AIX-PPC64-NEXT: ld 26, -48(1) # 8-byte Folded Reload
362362
; AIX-PPC64-NEXT: blr
363363
;
364364
; PPC64LE-LABEL: vector_i128_i16:

‎llvm/test/CodeGen/PowerPC/inline-asm-clobber-warning.ll

Lines changed: 23 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1,7 +1,7 @@
11
; RUN: llc < %s -verify-machineinstrs -mtriple=powerpc-unknown-unkown \
2-
; RUN: -mcpu=pwr7 2>&1 | FileCheck %s
2+
; RUN: -mcpu=pwr7 -O0 2>&1 | FileCheck %s
33
; RUN: llc < %s -verify-machineinstrs -mtriple=powerpc64-unknown-unkown \
4-
; RUN: -mcpu=pwr7 2>&1 | FileCheck %s
4+
; RUN: -mcpu=pwr7 -O0 2>&1 | FileCheck %s
55

66
define void @test_r1_clobber() {
77
entry:
@@ -20,3 +20,24 @@ entry:
2020

2121
; CHECK: warning: inline asm clobber list contains reserved registers: X1
2222
; CHECK-NEXT: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
23+
24+
; CHECK: warning: inline asm clobber list contains reserved registers: R31
25+
; CHECK-NEXT: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
26+
27+
@a = dso_local global i32 100, align 4
28+
define dso_local signext i32 @main() {
29+
entry:
30+
%retval = alloca i32, align 4
31+
%old = alloca i64, align 8
32+
store i32 0, ptr %retval, align 4
33+
call void asm sideeffect "li 31, 1", "~{r31}"()
34+
call void asm sideeffect "li 30, 1", "~{r30}"()
35+
%0 = call i64 asm sideeffect "mr $0, 31", "=r"()
36+
store i64 %0, ptr %old, align 8
37+
%1 = load i32, ptr @a, align 4
38+
%conv = sext i32 %1 to i64
39+
%2 = alloca i8, i64 %conv, align 16
40+
%3 = load i64, ptr %old, align 8
41+
%conv1 = trunc i64 %3 to i32
42+
ret i32 %conv1
43+
}

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