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| author | Sean Fertile <sfertile@ca.ibm.com> | 2017-07-05 17:57:57 +0000 |
|---|---|---|
| committer | Sean Fertile <sfertile@ca.ibm.com> | 2017-07-05 17:57:57 +0000 |
| commit | cb358c5493cfb9af8cdca3d7e46876d74204d279 (patch) | |
| tree | 7f1122eeddfb81878fe223f2325441f282b65a60 /test/CodeGen/PowerPC/ppc-ctr-dead-code.ll | |
| parent | e54a2b399d1abb792c816430a2ac4e09962113a9 (diff) | |
[PowerPC] Make sure that we remove dead PHI nodes after the PPCCTRLoops pass.
Commiting on behalf of Stefan Pintilie.
Differential Revision: https://reviews.llvm.org/D34829
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@307180 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/PowerPC/ppc-ctr-dead-code.ll')
| -rw-r--r-- | test/CodeGen/PowerPC/ppc-ctr-dead-code.ll | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/test/CodeGen/PowerPC/ppc-ctr-dead-code.ll b/test/CodeGen/PowerPC/ppc-ctr-dead-code.ll new file mode 100644 index 00000000000..71755f722cb --- /dev/null +++ b/test/CodeGen/PowerPC/ppc-ctr-dead-code.ll @@ -0,0 +1,38 @@ +; RUN: llc < %s -mtriple=powerpc64le-unknown-linux-gnu -mcpu=pwr9 -verify-machineinstrs | FileCheck %s +; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr9 -verify-machineinstrs | FileCheck %s +; RUN: llc < %s -mtriple=powerpc64le-unknown-linux-gnu -mcpu=pwr8 -verify-machineinstrs | FileCheck %s +; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr8 -verify-machineinstrs | FileCheck %s + +; Function Attrs: norecurse nounwind readonly +define signext i32 @limit_loop(i32 signext %iters, i32* nocapture readonly %vec, i32 signext %limit) local_unnamed_addr { +entry: + %cmp5 = icmp sgt i32 %iters, 0 + br i1 %cmp5, label %for.body.preheader, label %cleanup + +for.body.preheader: ; preds = %entry + %0 = sext i32 %iters to i64 + br label %for.body + +for.cond: ; preds = %for.body + %cmp = icmp slt i64 %indvars.iv.next, %0 + br i1 %cmp, label %for.body, label %cleanup + +for.body: ; preds = %for.body.preheader, %for.cond + %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.cond ] + %arrayidx = getelementptr inbounds i32, i32* %vec, i64 %indvars.iv + %1 = load i32, i32* %arrayidx, align 4 + %cmp1 = icmp slt i32 %1, %limit + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 + br i1 %cmp1, label %for.cond, label %cleanup + +cleanup: ; preds = %for.body, %for.cond, %entry + %2 = phi i32 [ 0, %entry ], [ 0, %for.cond ], [ 1, %for.body ] + ret i32 %2 +; CHECK-LABEL: limit_loop +; CHECK: mtctr +; CHECK-NOT: addi {{[0-9]+}}, {{[0-9]+}}, 1 +; CHECK: bdnz +; CHECK: blr +} + + |