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| author | Jim Grosbach <grosbach@apple.com> | 2010-07-14 17:45:16 +0000 |
|---|---|---|
| committer | Jim Grosbach <grosbach@apple.com> | 2010-07-14 17:45:16 +0000 |
| commit | 502e0aa62833a1648d66c8f7edf5d21cf96c2f56 (patch) | |
| tree | 61e13517a5fc09e2614aa36e360bda51ea553118 /test/CodeGen/Thumb2/thumb2-sbc.ll | |
| parent | 2dd50e656f048d222aaaa57168688326fa52421b (diff) | |
| download | external_llvm-502e0aa62833a1648d66c8f7edf5d21cf96c2f56.zip external_llvm-502e0aa62833a1648d66c8f7edf5d21cf96c2f56.tar.gz external_llvm-502e0aa62833a1648d66c8f7edf5d21cf96c2f56.tar.bz2 | |
Improve 64-subtraction of immediates when parts of the immediate can fit
in the literal field of an instruction. E.g.,
long long foo(long long a) {
return a - 734439407618LL;
}
rdar://7038284
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108339 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/Thumb2/thumb2-sbc.ll')
| -rw-r--r-- | test/CodeGen/Thumb2/thumb2-sbc.ll | 50 |
1 files changed, 48 insertions, 2 deletions
diff --git a/test/CodeGen/Thumb2/thumb2-sbc.ll b/test/CodeGen/Thumb2/thumb2-sbc.ll index ad96291..de6502d 100644 --- a/test/CodeGen/Thumb2/thumb2-sbc.ll +++ b/test/CodeGen/Thumb2/thumb2-sbc.ll @@ -1,8 +1,54 @@ -; RUN: llc < %s -march=thumb -mattr=+thumb2 | FileCheck %s +; RUN: llc -march=thumb -mattr=+thumb2 < %s | FileCheck %s define i64 @f1(i64 %a, i64 %b) { -; CHECK: f1: +; CHECK: f1 ; CHECK: subs r0, r0, r2 %tmp = sub i64 %a, %b ret i64 %tmp } + +; 734439407618 = 0x000000ab00000002 +define i64 @f2(i64 %a) { +; CHECK: f2 +; CHECK: subs r0, #2 +; CHECK: sbc r1, r1, #171 + %tmp = sub i64 %a, 734439407618 + ret i64 %tmp +} + +; 5066626890203138 = 0x0012001200000002 +define i64 @f3(i64 %a) { +; CHECK: f3 +; CHECK: subs r0, #2 +; CHECK: sbc r1, r1, #1179666 + %tmp = sub i64 %a, 5066626890203138 + ret i64 %tmp +} + +; 3747052064576897026 = 0x3400340000000002 +define i64 @f4(i64 %a) { +; CHECK: f4 +; CHECK: subs r0, #2 +; CHECK: sbc r1, r1, #872428544 + %tmp = sub i64 %a, 3747052064576897026 + ret i64 %tmp +} + +; 6221254862626095106 = 0x5656565600000002 +define i64 @f5(i64 %a) { +; CHECK: f5 +; CHECK: subs r0, #2 +; CHECK: adc r1, r1, #-1448498775 + %tmp = sub i64 %a, 6221254862626095106 + ret i64 %tmp +} + +; 287104476244869122 = 0x03fc000000000002 +define i64 @f6(i64 %a) { +; CHECK: f6 +; CHECK: subs r0, #2 +; CHECK: sbc r1, r1, #66846720 + %tmp = sub i64 %a, 287104476244869122 + ret i64 %tmp +} + |