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PPC: Add some missing V_SET0 patterns
[oota-llvm.git]
/
lib
/
Support
/
BlockFrequency.cpp
diff --git
a/lib/Support/BlockFrequency.cpp
b/lib/Support/BlockFrequency.cpp
index 6e4d6b1b33c016f655bb144e06459bb8d5f82eda..5e45e46cf9743d73bb5f44f221dba936aa7f8571 100644
(file)
--- a/
lib/Support/BlockFrequency.cpp
+++ b/
lib/Support/BlockFrequency.cpp
@@
-47,9
+47,11
@@
static uint64_t div96bit(uint64_t W[2], uint32_t D) {
uint64_t x = W[1];
unsigned i;
uint64_t x = W[1];
unsigned i;
+ assert(x != 0 && "This is really a 64-bit division");
+
// This long division algorithm automatically saturates on overflow.
for (i = 0; i < 64 && x; ++i) {
// This long division algorithm automatically saturates on overflow.
for (i = 0; i < 64 && x; ++i) {
- uint32_t t =
(int)x >> 31;
+ uint32_t t =
-((x >> 31) & 1); // Splat bit 31 to bits 0-31.
x = (x << 1) | (y >> 63);
y = y << 1;
if ((x | t) >= D) {
x = (x << 1) | (y >> 63);
y = y << 1;
if ((x | t) >= D) {
@@
-71,7
+73,7
@@
void BlockFrequency::scale(uint32_t N, uint32_t D) {
uint64_t MulRes = (MulHi << 32) + MulLo;
// If the product fits in 64 bits, just use built-in division.
uint64_t MulRes = (MulHi << 32) + MulLo;
// If the product fits in 64 bits, just use built-in division.
- if (MulHi <= UINT32_MAX && MulRes
<
= MulLo) {
+ if (MulHi <= UINT32_MAX && MulRes
>
= MulLo) {
Frequency = MulRes / D;
return;
}
Frequency = MulRes / D;
return;
}