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For APInt::z/sext(width), if width == BitWidth, just return *this.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35065 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Zhou Sheng
2007-03-12 17:47:45 +00:00
parent 8cb6834ccf
commit 7d820f57e2
1 changed files with 4 additions and 0 deletions
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4
lib/Support/APInt.cpp
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@ -921,6 +921,8 @@ APInt &APInt::trunc(uint32_t width) {
// Sign extend to a new width. // Sign extend to a new width.
APInt &APInt::sext(uint32_t width) { APInt &APInt::sext(uint32_t width) {
if (width == BitWidth)
return *this;
assert(width > BitWidth && "Invalid APInt SignExtend request"); assert(width > BitWidth && "Invalid APInt SignExtend request");
assert(width <= IntegerType::MAX_INT_BITS && "Too many bits"); assert(width <= IntegerType::MAX_INT_BITS && "Too many bits");
// If the sign bit isn't set, this is the same as zext. // If the sign bit isn't set, this is the same as zext.
@ -969,6 +971,8 @@ APInt &APInt::sext(uint32_t width) {
// Zero extend to a new width. // Zero extend to a new width.
APInt &APInt::zext(uint32_t width) { APInt &APInt::zext(uint32_t width) {
if (width == BitWidth)
return *this;
assert(width > BitWidth && "Invalid APInt ZeroExtend request"); assert(width > BitWidth && "Invalid APInt ZeroExtend request");
assert(width <= IntegerType::MAX_INT_BITS && "Too many bits"); assert(width <= IntegerType::MAX_INT_BITS && "Too many bits");
uint32_t wordsBefore = getNumWords(); uint32_t wordsBefore = getNumWords();