[clang] [llvm] [Pipelines] Move IPSCCP after inliner pipeline (PR #96620)

[Yingwei Zheng via cfe-commits]

dtcxzyw wrote:

> This patch causes some significant performance regressions on llvm-test-suite (rv64gc-O3-thinlto):
> 
> Name	Before	After	Ratio
> SingleSource/Benchmarks/Shootout/Shootout-random	2.150161677	3.300161641	+ 53.5%
> SingleSource/Benchmarks/Polybench/linear-algebra/kernels/trisolv/trisolv	0.111845159	0.145389494	+30.0%
> SingleSource/Benchmarks/Adobe-C++/functionobjects	5.489498263	6.827863965	+24.4%

It has been fixed. But this patch didn't show a positive net effect :(



https://github.com/llvm/llvm-project/pull/96620