forked from OSchip/llvm-project
[Builtins] Fix div0 error in udivsi3
Summary: Need to save `lr` before bl to aeabi_div0 Reviewers: rengolin, compnerd Reviewed By: compnerd Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D31716 llvm-svn: 299628
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@ -37,7 +37,16 @@ DEFINE_COMPILERRT_FUNCTION(__udivsi3)
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beq LOCAL_LABEL(divby0)
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udiv r0, r0, r1
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bx lr
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LOCAL_LABEL(divby0):
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mov r0, #0
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# ifdef __ARM_EABI__
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b __aeabi_idiv0
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# else
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JMP(lr)
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# endif
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#else /* ! __ARM_ARCH_EXT_IDIV__ */
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cmp r1, #1
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bcc LOCAL_LABEL(divby0)
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#if __ARM_ARCH_ISA_THUMB == 1
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@ -186,9 +195,12 @@ LOCAL_LABEL(skip_1):
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LOCAL_LABEL(divby0):
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movs r0, #0
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# if defined(__ARM_EABI__)
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push {r7, lr}
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bl __aeabi_idiv0 // due to relocation limit, can't use b.
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# endif
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pop {r7, pc}
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# else
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JMP(lr)
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# endif
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#if __ARM_ARCH_ISA_THUMB == 1
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@ -252,16 +264,6 @@ LOCAL_LABEL(div0block):
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JMP(lr)
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#endif /* __ARM_ARCH_EXT_IDIV__ */
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#if __ARM_ARCH_EXT_IDIV__
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LOCAL_LABEL(divby0):
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mov r0, #0
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# ifdef __ARM_EABI__
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b __aeabi_idiv0
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# else
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JMP(lr)
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# endif
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#endif
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END_COMPILERRT_FUNCTION(__udivsi3)
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NO_EXEC_STACK_DIRECTIVE
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