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52 lines
1.5 KiB
LLVM
52 lines
1.5 KiB
LLVM
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; RUN: llc -march=hexagon -mcpu=hexagonv5 -enable-pipeliner -verify-machineinstrs < %s | FileCheck %s
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; If the trip count is a compile-time constant, then decrement it instead
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; of computing a new LC0 value.
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; CHECK-LABEL: @test
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; CHECK: loop0(.LBB0_1, #998)
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define i32 @test(i32* %A, i32* %B, i32 %count) {
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entry:
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br label %for.body
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for.body:
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%sum.02 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%arrayidx.phi = phi i32* [ %A, %entry ], [ %arrayidx.inc, %for.body ]
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%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%0 = load i32, i32* %arrayidx.phi, align 4
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%add = add nsw i32 %0, %sum.02
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%inc = add nsw i32 %i.01, 1
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%exitcond = icmp eq i32 %inc, 1000
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%arrayidx.inc = getelementptr i32, i32* %arrayidx.phi, i32 1
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br i1 %exitcond, label %for.end, label %for.body
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for.end:
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ret i32 %add
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}
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; The constant trip count is small enough that the kernel is not executed.
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; CHECK-LABEL: @test1
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; CHECK-NOT: loop0(
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define i32 @test1(i32* %A, i32* %B, i32 %count) {
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entry:
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br label %for.body
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for.body:
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%sum.02 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%arrayidx.phi = phi i32* [ %A, %entry ], [ %arrayidx.inc, %for.body ]
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%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%0 = load i32, i32* %arrayidx.phi, align 4
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%add = add nsw i32 %0, %sum.02
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%inc = add nsw i32 %i.01, 1
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%exitcond = icmp eq i32 %inc, 1
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%arrayidx.inc = getelementptr i32, i32* %arrayidx.phi, i32 1
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br i1 %exitcond, label %for.end, label %for.body
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for.end:
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ret i32 %add
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}
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