Closed Bug 1193515 Opened 10 years ago Closed 10 years ago

IonMonkey: Register allocation spills after reused registers

Categories

(Core :: JavaScript Engine: JIT, defect)

defect
Not set
normal

Tracking

()

RESOLVED DUPLICATE of bug 1179242

People

(Reporter: sunfish, Unassigned)

Details

(Keywords: perf)

For this code: (function test (glob, env, b) { 'use asm'; function add(x) { x = x|0; x = (((x >> 1) >> 1) >> 1) >> 1; return x|0; } return add; })(); The register allocator currently spills the value after each shift on x64: sarl $1, %eax movl %eax, 0xc(%rsp) sarl $1, %eax movl %eax, 0xc(%rsp) sarl $1, %eax movl %eax, 0xc(%rsp) sarl $1, %eax movl %eax, 0xc(%rsp)
The testcase above is also fixed by the changes for bug 1179242.
Status: NEW → RESOLVED
Closed: 10 years ago
Resolution: --- → DUPLICATE
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