[PowerPC] return correct frame address for frameaddress intrinsic

Author: Chen Zheng

llvm/lib/Target/PowerPC/PPCFrameLowering.cpp

@@ -317,7 +317,8 @@ PPCFrameLowering::determineFrameLayout(const MachineFunction &MF,
                        !MFI.adjustsStack() &&       // No calls.
                        !MustSaveLR(MF, LR) &&       // No need to save LR.
                        !FI->mustSaveTOC() &&        // No need to save TOC.
-                       !RegInfo->hasBasePointer(MF); // No special alignment.
+                       !RegInfo->hasBasePointer(MF) && // No special alignment.
+                       !MFI.isFrameAddressTaken();
 
   // Note: for PPC32 SVR4ABI, we can still generate stackless
   // code if all local vars are reg-allocated.

llvm/test/CodeGen/PowerPC/2010-05-03-retaddr1.ll

@@ -7,7 +7,9 @@ declare ptr @llvm.frameaddress(i32) nounwind readnone
 define ptr @g2() nounwind readnone {
 ; CHECK-LABEL: g2:
 ; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    stwu 1, -16(1)
 ; CHECK-NEXT:    lwz 3, 0(1)
+; CHECK-NEXT:    addi 1, 1, 16
 ; CHECK-NEXT:    blr
 entry:
   %0 = tail call ptr @llvm.frameaddress(i32 1)    ; <ptr> [#uses=1]

llvm/test/CodeGen/PowerPC/frameaddr.ll

@@ -6,17 +6,23 @@
 define ptr @main() #0 {
 ; AIX32-LABEL: main:
 ; AIX32:       # %bb.0: # %entry
+; AIX32-NEXT:    stwu 1, -32(1)
 ; AIX32-NEXT:    mr 3, 1
+; AIX32-NEXT:    addi 1, 1, 32
 ; AIX32-NEXT:    blr
 ;
 ; AIX64-LABEL: main:
 ; AIX64:       # %bb.0: # %entry
+; AIX64-NEXT:    stdu 1, -48(1)
 ; AIX64-NEXT:    mr 3, 1
+; AIX64-NEXT:    addi 1, 1, 48
 ; AIX64-NEXT:    blr
 ;
 ; LE-LABEL: main:
 ; LE:       # %bb.0: # %entry
+; LE-NEXT:    stdu 1, -32(1)
 ; LE-NEXT:    mr 3, 1
+; LE-NEXT:    addi 1, 1, 32
 ; LE-NEXT:    blr
 entry:
   %0 = call ptr @llvm.frameaddress(i32 0)
@@ -46,17 +52,23 @@ entry:
 define ptr @foo1() #0 {
 ; AIX32-LABEL: foo1:
 ; AIX32:       # %bb.0: # %entry
+; AIX32-NEXT:    stwu 1, -32(1)
 ; AIX32-NEXT:    lwz 3, 0(1)
+; AIX32-NEXT:    addi 1, 1, 32
 ; AIX32-NEXT:    blr
 ;
 ; AIX64-LABEL: foo1:
 ; AIX64:       # %bb.0: # %entry
+; AIX64-NEXT:    stdu 1, -48(1)
 ; AIX64-NEXT:    ld 3, 0(1)
+; AIX64-NEXT:    addi 1, 1, 48
 ; AIX64-NEXT:    blr
 ;
 ; LE-LABEL: foo1:
 ; LE:       # %bb.0: # %entry
+; LE-NEXT:    stdu 1, -32(1)
 ; LE-NEXT:    ld 3, 0(1)
+; LE-NEXT:    addi 1, 1, 32
 ; LE-NEXT:    blr
 entry:
   %0 = call ptr @llvm.frameaddress(i32 1)
@@ -66,20 +78,26 @@ entry:
 define ptr @foo2() #0 {
 ; AIX32-LABEL: foo2:
 ; AIX32:       # %bb.0: # %entry
+; AIX32-NEXT:    stwu 1, -32(1)
 ; AIX32-NEXT:    lwz 3, 0(1)
 ; AIX32-NEXT:    lwz 3, 0(3)
+; AIX32-NEXT:    addi 1, 1, 32
 ; AIX32-NEXT:    blr
 ;
 ; AIX64-LABEL: foo2:
 ; AIX64:       # %bb.0: # %entry
+; AIX64-NEXT:    stdu 1, -48(1)
 ; AIX64-NEXT:    ld 3, 0(1)
 ; AIX64-NEXT:    ld 3, 0(3)
+; AIX64-NEXT:    addi 1, 1, 48
 ; AIX64-NEXT:    blr
 ;
 ; LE-LABEL: foo2:
 ; LE:       # %bb.0: # %entry
+; LE-NEXT:    stdu 1, -32(1)
 ; LE-NEXT:    ld 3, 0(1)
 ; LE-NEXT:    ld 3, 0(3)
+; LE-NEXT:    addi 1, 1, 32
 ; LE-NEXT:    blr
 entry:
   %0 = call ptr @llvm.frameaddress(i32 2)