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ICU-21781 suppress Wstringop-overflow in decNumber

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Currently there are a few compiler warnings generated when using GCC
11.2.1:

decNumber.cpp: In function ‘decNumber* uprv_decNumberSquareRoot_70(
    decNumber*, const decNumber*, decContext*)’:
decNumber.cpp:2976:31: warning:
 writing 1 byte into a region of size 0 [-Wstringop-overflow=]
 2976 |         t->lsu[0]=9; t->lsu[1]=5; t->lsu[2]=2;
      |                      ~~~~~~~~~^~
In file included from decNumber.cpp:184:
decNumber.h:89:19: note:
 at offset 1 into destination object ‘decNumber::lsu’ of size 1
   89 |     decNumberUnit lsu[DECNUMUNITS];
      |                   ^~~

There is an ignore for array-bounds warnings in this file which was
added in Commit 38f7c0625c ("ICU-8954
add pragma to slience clang/gcc 4.6 about array bound error"). This
commit add an ignore for stringop-overflow to suppress this warning.
This commit is contained in:
Daniel Bevenius 2021-10-01 10:22:55 +02:00
parent b9311e2f54
commit 396d3cc3ca
1 changed files with 3 additions and 0 deletions
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3
icu4c/source/i18n/decNumber.cpp
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@ -1414,6 +1414,7 @@ U_CAPI decNumber * U_EXPORT2 uprv_decNumberLogB(decNumber *res, const decNumber
#if defined(__clang__) || U_GCC_MAJOR_MINOR >= 406
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Warray-bounds"
#pragma GCC diagnostic ignored "-Wstringop-overflow"
#endif
U_CAPI decNumber * U_EXPORT2 uprv_decNumberLog10(decNumber *res, const decNumber *rhs,
decContext *set) {
@ -2829,6 +2830,7 @@ U_CAPI decNumber * U_EXPORT2 uprv_decNumberShift(decNumber *res, const decNumber
#if defined(__clang__) || U_GCC_MAJOR_MINOR >= 406
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Warray-bounds"
#pragma GCC diagnostic ignored "-Wstringop-overflow"
#endif
U_CAPI decNumber * U_EXPORT2 uprv_decNumberSquareRoot(decNumber *res, const decNumber *rhs,
decContext *set) {
@ -5626,6 +5628,7 @@ static const uShort LNnn[90]={9016, 8652, 8316, 8008, 7724, 7456, 7208,
#if defined(__clang__) || U_GCC_MAJOR_MINOR >= 406
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Warray-bounds"
#pragma GCC diagnostic ignored "-Wstringop-overflow"
#endif
decNumber * decLnOp(decNumber *res, const decNumber *rhs,
decContext *set, uInt *status) {