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Shrink ADDS, ADC, RSB, and SUBS.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78776 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-08-12 01:49:45 +00:00
parent 394346ba3a
commit 05c269c645
10 changed files with 164 additions and 49 deletions
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12
test/CodeGen/Thumb2/carry.ll
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@@ -1,15 +1,21 @@
; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | grep "subs\\.w r" | count 2
; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | grep "adc\\.w r"
; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | grep "sbc\\.w r" | count 2
; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | FileCheck %s
define i64 @f1(i64 %a, i64 %b) {
entry:
; CHECK: f1:
; CHECK: subs r0, r0, r2
; CHECK: sbcs r1, r3
%tmp = sub i64 %a, %b
ret i64 %tmp
}
define i64 @f2(i64 %a, i64 %b) {
entry:
; CHECK: f2:
; CHECK: adds r0, r0, r0
; CHECK: adcs r1, r1
; CHECK: subs r0, r0, r2
; CHECK: sbcs r1, r3
%tmp1 = shl i64 %a, 1
%tmp2 = sub i64 %tmp1, %b
ret i64 %tmp2