[PATCH] D31716: [Builtins] Fix div0 error in udivsi3

[Weiming Zhao via Phabricator via llvm-commits]

weimingz created this revision.

Need to save `lr` before bl to aeabi_div0


https://reviews.llvm.org/D31716

Files:
  lib/builtins/arm/udivsi3.S


Index: lib/builtins/arm/udivsi3.S
===================================================================
--- lib/builtins/arm/udivsi3.S
+++ lib/builtins/arm/udivsi3.S
@@ -186,9 +186,12 @@
 LOCAL_LABEL(divby0):
 	movs	r0, #0
 #      if defined(__ARM_EABI__)
+	push {r6, lr}
 	bl	__aeabi_idiv0 // due to relocation limit, can't use b.
-#      endif
+	pop  {r6, pc}
+#      else
 	JMP(lr)
+#      endif
 
 
 #if __ARM_ARCH_ISA_THUMB == 1


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