llvm-project

Author	SHA1	Message	Date
Juergen Ributzka	9f54dbe7a1	Revert "[AArch64][FastISel] Add more truncation tests." and "[AArch64][FastISel] Always use an AND instruction when truncating to non-legal types." This reverts commit r243198 and 243304. Turns out this wasn't the correct fix for this problem. It works only within FastISel, but fails when the truncate is selected by SDAG. llvm-svn: 244287	2015-08-06 22:13:48 +00:00
Juergen Ributzka	6364985b58	[AArch64][FastISel] Always use an AND instruction when truncating to non-legal types. When truncating to non-legal types (such as i16, i8 and i1) always use an AND instruction to mask out the upper bits. This was only done when the source type was an i64, but not when the source type was an i32. This commit fixes this and adds the missing i32 truncate tests. This fixes rdar://problem/21990703. llvm-svn: 243198	2015-07-25 02:16:53 +00:00
Pete Cooper	f52123b454	[AArch64] Fix sext/zext folding in address arithmetic. We were accidentally folding a sign/zero extend in to address arithmetic in a different BB when the extend wasn't available there. Cross BB fast-isel isn't safe, so restrict this to only when the extend is in the same BB as the use. llvm-svn: 236764	2015-05-07 19:21:36 +00:00

Author

SHA1

Message

Date

Juergen Ributzka

9f54dbe7a1

Revert "[AArch64][FastISel] Add more truncation tests." and "[AArch64][FastISel] Always use an AND instruction when truncating to non-legal types."

This reverts commit r243198 and 243304.

Turns out this wasn't the correct fix for this problem. It works only within
FastISel, but fails when the truncate is selected by SDAG.

llvm-svn: 244287

2015-08-06 22:13:48 +00:00

Juergen Ributzka

6364985b58

[AArch64][FastISel] Always use an AND instruction when truncating to non-legal types.

When truncating to non-legal types (such as i16, i8 and i1) always use an AND
instruction to mask out the upper bits. This was only done when the source type
was an i64, but not when the source type was an i32.

This commit fixes this and adds the missing i32 truncate tests.

This fixes rdar://problem/21990703.

llvm-svn: 243198

2015-07-25 02:16:53 +00:00

Pete Cooper

f52123b454

[AArch64] Fix sext/zext folding in address arithmetic.

We were accidentally folding a sign/zero extend in to address arithmetic in a different BB when the extend wasn't available there.

Cross BB fast-isel isn't safe, so restrict this to only when the extend is in the same BB as the use.

llvm-svn: 236764

2015-05-07 19:21:36 +00:00

3 Commits