Merge remote-tracking branch 'upstream/release/19.x' into rustc/19.1-…

…2024-12-03

Merge remote-tracking branch 'upstream/release/19.x' into rustc/19.1-…

…2024-12-03

Merge remote-tracking branch 'upstream/release/19.x' into rustc/19.1-…

…2024-12-03

Revert "[ELF] Fix unnecessary inclusion of unreferenced provide symbols"

This reverts commit ebb326a.

Revert "[ELF] Fix unnecessary inclusion of unreferenced provide symbols"

This reverts commit ebb326a.

Revert "[ELF] Fix unnecessary inclusion of unreferenced provide symbols"

This reverts commit ebb326a.

[Mem2Reg] Always allow single-store optimization for dominating stores

In llvm#97711 the single-store optimization was disabled for the case
where the value is potentially poison, as this may produce incorrect
results for loads of uninitialized memory.

However, this resulted in compile-time regressions. Address these
by still allowing the single-store optimization to occur in cases
where the store dominates the load, as we know that such a load
will always read initialized memory.

(cherry picked from commit daaea12)

[Mem2Reg] Always allow single-store optimization for dominating stores

In llvm#97711 the single-store optimization was disabled for the case
where the value is potentially poison, as this may produce incorrect
results for loads of uninitialized memory.

However, this resulted in compile-time regressions. Address these
by still allowing the single-store optimization to occur in cases
where the store dominates the load, as we know that such a load
will always read initialized memory.

(cherry picked from commit daaea12)

[Mem2Reg] Always allow single-store optimization for dominating stores

In llvm#97711 the single-store optimization was disabled for the case
where the value is potentially poison, as this may produce incorrect
results for loads of uninitialized memory.

However, this resulted in compile-time regressions. Address these
by still allowing the single-store optimization to occur in cases
where the store dominates the load, as we know that such a load
will always read initialized memory.

(cherry picked from commit daaea12)

Merge remote-tracking branch 'upstream/release/18.x' into rustc/18.1-…

…2024-05-19