[PATCH] D10909: PrologEpilogInserter: Improve API to determine callee save regsiters.

[hfinkel at anl.gov]

hfinkel added a subscriber: hfinkel.
hfinkel accepted this revision.
hfinkel added a reviewer: hfinkel.
hfinkel added a comment.
This revision is now accepted and ready to land.

LGTM.


================
Comment at: lib/Target/AArch64/AArch64FrameLowering.cpp:356
@@ -355,4 +355,3 @@
     // Use the first callee-saved register as a scratch register
-    assert(MF.getRegInfo().isPhysRegUsed(AArch64::X9) &&
-           "No scratch register to align SP!");
+    assert(!MFI->getPristineRegs(MF).test(AArch64::X9));
     scratchSPReg = AArch64::X9;
----------------
Please don't remove the descriptive string from the assert.

================
Comment at: lib/Target/ARM/ARMFrameLowering.cpp:803
@@ -802,4 +802,3 @@
           // Use the first callee-saved register as a scratch register.
-          assert(MF.getRegInfo().isPhysRegUsed(ARM::R4) &&
-                 "No scratch register to restore SP from FP!");
+          assert(!MFI->getPristineRegs(MF).test(ARM::R4));
           emitT2RegPlusImmediate(MBB, MBBI, dl, ARM::R4, FramePtr, -NumBytes,
----------------
Same here.


Repository:
  rL LLVM

http://reviews.llvm.org/D10909