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| author | Hal Finkel <hfinkel@anl.gov> | 2013-04-06 19:30:30 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-04-06 19:30:30 +0000 |
| commit | 839b9096538f790a2bb060547df24703807cb83b (patch) | |
| tree | 0cf51af4bf2e88a7a170f6ef96961f35b7699a07 /test/CodeGen/PowerPC/fold-zero.ll | |
| parent | 012ffd56059576d4a0ee523f673b3190b1f03311 (diff) | |
| download | external_llvm-839b9096538f790a2bb060547df24703807cb83b.zip external_llvm-839b9096538f790a2bb060547df24703807cb83b.tar.gz external_llvm-839b9096538f790a2bb060547df24703807cb83b.tar.bz2 | |
Implement PPCInstrInfo::FoldImmediate
There are certain PPC instructions into which we can fold a zero immediate
operand. We can detect such cases by looking at the register class required
by the using operand (so long as it is not otherwise constrained).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178961 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/PowerPC/fold-zero.ll')
| -rw-r--r-- | test/CodeGen/PowerPC/fold-zero.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/CodeGen/PowerPC/fold-zero.ll b/test/CodeGen/PowerPC/fold-zero.ll new file mode 100644 index 0000000..c7ec6fa --- /dev/null +++ b/test/CodeGen/PowerPC/fold-zero.ll @@ -0,0 +1,14 @@ +; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 | FileCheck %s +target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64" +target triple = "powerpc64-unknown-linux-gnu" + +define i32 @test1(i1 %a, i32 %c) nounwind { + %x = select i1 %a, i32 %c, i32 0 + ret i32 %x + +; CHECK: @test1 +; CHECK-NOT: li {{[0-9]+}}, 0 +; CHECK: isel 3, 0, +; CHECK: blr +} + |