llvm-mirror/thumb2-sub5.ll at 3d7e85d5b83c720a94e00950458cc0582a8fa4dc - llvm-mirror - Git.je (Gitea)

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Andrew Trick a130d110d1 Thumb2 and ARM add/subtract with carry fixes.

Fixes Thumb2 ADCS and SBCS lowering: <rdar://problem/9275821>.
t2ADCS/t2SBCS are now pseudo instructions, consistent with ARM, so the
assembly printer correctly prints the 's' suffix.

Fixes Thumb2 adde -> SBC matching to check for live/dead carry flags.

Fixes the internal ARM machine opcode mnemonic for ADCS/SBCS.
Fixes ARM SBC lowering to check for live carry (potential bug).

llvm-svn: 130048

2011-04-23 03:55:32 +00:00

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 ; RUN: llc < %s -march=thumb -mattr=+thumb2 -mattr=+32bit | FileCheck %s
 define i64 @f1(i64 %a, i64 %b) {
 ; CHECK: f1:
 ; CHECK: subs.w r0, r0, r2
 ; To test dead_carry, +32bit prevents sbc conveting to 16-bit sbcs
 ; CHECK: sbc.w  r1, r1, r3
     %tmp = sub i64 %a, %b
     ret i64 %tmp
 }