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| author | Vasileios Kalintiris <Vasileios.Kalintiris@imgtec.com> | 2015-02-27 09:01:39 +0000 |
|---|---|---|
| committer | Vasileios Kalintiris <Vasileios.Kalintiris@imgtec.com> | 2015-02-27 09:01:39 +0000 |
| commit | 912e816cc2eea0c9773530f16dcd4ec8b885e32f (patch) | |
| tree | af9bce504815dc09b277bf76c358cfc94c132379 /test | |
| parent | f891336a25215a6d0720689ccce8bc31dbe3e9ac (diff) | |
[mips] Account for constant-zero operands in ADDE nodes.
Summary:
We identify the cases where the operand to an ADDE node is a constant
zero. In such cases, we can avoid generating an extra ADDu instruction
disguised as an identity move alias (ie. addu $r, $r, 0 --> move $r, $r).
Reviewers: dsanders
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D7906
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230742 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/Mips/check-adde-redundant-moves.ll | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/test/CodeGen/Mips/check-adde-redundant-moves.ll b/test/CodeGen/Mips/check-adde-redundant-moves.ll new file mode 100644 index 00000000000..7bc63a494ac --- /dev/null +++ b/test/CodeGen/Mips/check-adde-redundant-moves.ll @@ -0,0 +1,35 @@ +; RUN: llc < %s -march=mips -mcpu=mips2 | FileCheck %s \ +; RUN: -check-prefix=ALL -check-prefix=GP32 +; RUN: llc < %s -march=mips -mcpu=mips32 | FileCheck %s \ +; RUN: -check-prefix=ALL -check-prefix=GP32 +; RUN: llc < %s -march=mips -mcpu=mips32r2 | FileCheck %s \ +; RUN: -check-prefix=ALL -check-prefix=GP32 +; RUN: llc < %s -march=mips -mcpu=mips32r3 | FileCheck %s \ +; RUN: -check-prefix=ALL -check-prefix=GP32 +; RUN: llc < %s -march=mips -mcpu=mips32r5 | FileCheck %s \ +; RUN: -check-prefix=ALL -check-prefix=GP32 +; RUN: llc < %s -march=mips -mcpu=mips32r6 | FileCheck %s \ +; RUN: -check-prefix=ALL -check-prefix=GP32 +; RUN: llc < %s -march=mips64 -mcpu=mips3 | FileCheck %s -check-prefix=ALL +; RUN: llc < %s -march=mips64 -mcpu=mips4 | FileCheck %s -check-prefix=ALL +; RUN: llc < %s -march=mips64 -mcpu=mips64 | FileCheck %s -check-prefix=ALL +; RUN: llc < %s -march=mips64 -mcpu=mips64r2 | FileCheck %s -check-prefix=ALL +; RUN: llc < %s -march=mips64 -mcpu=mips64r3 | FileCheck %s -check-prefix=ALL +; RUN: llc < %s -march=mips64 -mcpu=mips64r5 | FileCheck %s -check-prefix=ALL +; RUN: llc < %s -march=mips64 -mcpu=mips64r6 | FileCheck %s -check-prefix=ALL + +define i64 @add_i64(i64 %a) { + ; GP32-LABEL: add_i64 + + ; GP32-NOT: move $[[T0:[0-9]+]], $[[T0]] + %r = add i64 5, %a + ret i64 %r +} + +define i128 @add_i128(i128 %a) { + ; ALL-LABEL: add_i128 + + ; ALL-NOT: move $[[T0:[0-9]+]], $[[T0]] + %r = add i128 5, %a + ret i128 %r +} |