From 2a5e8c328eb0d957f00190c0c6189a4f1fef1117 Mon Sep 17 00:00:00 2001 From: Hal Finkel Date: Thu, 16 May 2013 16:52:41 +0000 Subject: PPC32 cannot form counter loops around i64 FP conversions On PPC32, i64 FP conversions are implemented using runtime calls (which clobber the counter register). These must be excluded. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182023 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/CodeGen/PowerPC/ctrloop-fp64.ll | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 test/CodeGen/PowerPC/ctrloop-fp64.ll (limited to 'test/CodeGen/PowerPC/ctrloop-fp64.ll') diff --git a/test/CodeGen/PowerPC/ctrloop-fp64.ll b/test/CodeGen/PowerPC/ctrloop-fp64.ll new file mode 100644 index 00000000000..78974248da5 --- /dev/null +++ b/test/CodeGen/PowerPC/ctrloop-fp64.ll @@ -0,0 +1,28 @@ +; RUN: llc < %s -mcpu=generic | FileCheck %s + +target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32" +target triple = "powerpc-unknown-linux-gnu" + +define i64 @foo(double* nocapture %n) nounwind readonly { +entry: + br label %for.body + +for.body: ; preds = %for.body, %entry + %i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ] + %x.05 = phi i64 [ 0, %entry ], [ %conv1, %for.body ] + %arrayidx = getelementptr inbounds double* %n, i32 %i.06 + %0 = load double* %arrayidx, align 8 + %conv = sitofp i64 %x.05 to double + %add = fadd double %conv, %0 + %conv1 = fptosi double %add to i64 + %inc = add nsw i32 %i.06, 1 + %exitcond = icmp eq i32 %inc, 2048 + br i1 %exitcond, label %for.end, label %for.body + +for.end: ; preds = %for.body + ret i64 %conv1 +} + +; CHECK: @foo +; CHECK-NOT: mtctr + -- cgit v1.2.3