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https://github.com/c64scene-ar/llvm-6502.git
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03d3d3b361
cleanup and overdue test cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132038 91177308-0d34-0410-b5e6-96231b3b80d8
124 lines
3.0 KiB
LLVM
124 lines
3.0 KiB
LLVM
; RUN: opt < %s -indvars -disable-iv-rewrite -S | FileCheck %s
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;
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; Make sure that indvars isn't inserting canonical IVs.
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; This is kinda hard to do until linear function test replacement is removed.
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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-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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define i32 @sum(i32* %arr, i32 %n) nounwind {
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entry:
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%precond = icmp slt i32 0, %n
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br i1 %precond, label %ph, label %return
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ph:
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br label %loop
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; CHECK: loop:
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;
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; We should only have 2 IVs.
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; CHECK: phi
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; CHECK: phi
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; CHECK-NOT: phi
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;
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; sext should be eliminated while preserving gep inboundsness.
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; CHECK-NOT: sext
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; CHECK: getelementptr inbounds
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loop:
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%i.02 = phi i32 [ 0, %ph ], [ %iinc, %loop ]
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%s.01 = phi i32 [ 0, %ph ], [ %sinc, %loop ]
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%ofs = sext i32 %i.02 to i64
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%adr = getelementptr inbounds i32* %arr, i64 %ofs
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%val = load i32* %adr
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%sinc = add nsw i32 %s.01, %val
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%iinc = add nsw i32 %i.02, 1
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%cond = icmp slt i32 %iinc, %n
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br i1 %cond, label %loop, label %exit
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exit:
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%s.lcssa = phi i32 [ %sinc, %loop ]
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br label %return
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return:
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%s.0.lcssa = phi i32 [ %s.lcssa, %exit ], [ 0, %entry ]
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ret i32 %s.0.lcssa
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}
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define i64 @suml(i32* %arr, i32 %n) nounwind {
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entry:
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%precond = icmp slt i32 0, %n
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br i1 %precond, label %ph, label %return
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ph:
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br label %loop
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; CHECK: loop:
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;
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; We should only have 2 IVs.
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; CHECK: phi
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; CHECK: phi
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; CHECK-NOT: phi
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;
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; %ofs sext should be eliminated while preserving gep inboundsness.
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; CHECK-NOT: sext
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; CHECK: getelementptr inbounds
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; %vall sext should obviously not be eliminated
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; CHECK: sext
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loop:
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%i.02 = phi i32 [ 0, %ph ], [ %iinc, %loop ]
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%s.01 = phi i64 [ 0, %ph ], [ %sinc, %loop ]
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%ofs = sext i32 %i.02 to i64
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%adr = getelementptr inbounds i32* %arr, i64 %ofs
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%val = load i32* %adr
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%vall = sext i32 %val to i64
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%sinc = add nsw i64 %s.01, %vall
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%iinc = add nsw i32 %i.02, 1
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%cond = icmp slt i32 %iinc, %n
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br i1 %cond, label %loop, label %exit
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exit:
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%s.lcssa = phi i64 [ %sinc, %loop ]
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br label %return
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return:
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%s.0.lcssa = phi i64 [ %s.lcssa, %exit ], [ 0, %entry ]
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ret i64 %s.0.lcssa
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}
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define void @outofbounds(i32* %first, i32* %last, i32 %idx) nounwind {
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%precond = icmp ne i32* %first, %last
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br i1 %precond, label %ph, label %return
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; CHECK: ph:
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; It's not indvars' job to perform LICM on %ofs
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; CHECK-NOT: sext
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ph:
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br label %loop
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; CHECK: loop:
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;
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; Preserve exactly one pointer type IV.
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; CHECK: phi i32*
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; CHECK-NOT: phi
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;
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; Don't create any extra adds.
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; CHECK-NOT: add
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;
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; Preserve gep inboundsness, and don't factor it.
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; CHECK: getelementptr inbounds i32* %ptriv, i32 1
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; CHECK-NOT: add
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loop:
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%ptriv = phi i32* [ %first, %ph ], [ %ptrpost, %loop ]
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%ofs = sext i32 %idx to i64
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%adr = getelementptr inbounds i32* %ptriv, i64 %ofs
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store i32 3, i32* %adr
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%ptrpost = getelementptr inbounds i32* %ptriv, i32 1
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%cond = icmp ne i32* %ptrpost, %last
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br i1 %cond, label %loop, label %exit
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exit:
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br label %return
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return:
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ret void
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}
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