https://bugs.llvm.org/show_bug.cgi?id=49752
Bug ID: 49752
Summary: Offload kernel performance regression
Product: OpenMP
Version: unspecified
Hardware: PC
OS: Linux
Status: CONFIRMED
Severity: enhancement
Priority: P
Component: Clang Compiler Support
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
both 12.x and main branch are affected by this bug.
offending commit
bd756286d2e774716a12f55db27d070595058d53
before
nvlink info : Function properties for
'__omp_offloading_10304_1c00a0d__ZN11qmcplusplus17einspline_spo_ompIfE18multi_evaluate_vghERKSt6vectorIPNS_6SPOSetESaIS4_EERKS2_IPNS_11ParticleSetESaISA_EEi_l412':
nvlink info : used 244 registers, 80 stack, 1134 bytes smem, 416 bytes
cmem[0], 24 bytes cmem[2], 0 bytes lmem
after
nvlink info : Function properties for
'__omp_offloading_10304_1c00a0d__ZN11qmcplusplus17einspline_spo_ompIfE18multi_evaluate_vghERKSt6vectorIPNS_6SPOSetESaIS4_EERKS2_IPNS_11ParticleSetESaISA_EEi_l412':
nvlink info : used 244 registers, 360 stack, 1134 bytes smem, 416 bytes
cmem[0], 24 bytes cmem[2], 0 bytes lmem
huge increase in stack.
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