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[BranchProbability] Delete a redundant overflow check

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llvm-svn: 363492
This commit is contained in:
Fangrui Song 2019-06-15 10:09:59 +00:00
parent c334a9e7fa
commit ae9b5d79fc
1 changed files with 0 additions and 4 deletions
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4
lib/Support/BranchProbability.cpp
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@ -88,10 +88,6 @@ static uint64_t scale(uint64_t Num, uint32_t N, uint32_t D) {
// Carry. // Carry.
Upper32 += Mid32 < Mid32Partial; Upper32 += Mid32 < Mid32Partial;
// Check for overflow.
if (Upper32 >= D)
return UINT64_MAX;
uint64_t Rem = (uint64_t(Upper32) << 32) | Mid32; uint64_t Rem = (uint64_t(Upper32) << 32) | Mid32;
uint64_t UpperQ = Rem / D; uint64_t UpperQ = Rem / D;