f5c62ee0fa
The insertion point of COPY isn't always optimal and could eventually lead to a worse block layout, see the regression test in the first commit. This change affects many architectures but the amount of total instructions in the test cases seems too be slightly lower.
57 lines
1.7 KiB
LLVM
57 lines
1.7 KiB
LLVM
; RUN: llc -mtriple=hexagon -mcpu=hexagonv67t < %s | FileCheck %s
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; RUN: llc -mtriple=hexagon -mcpu=hexagonv65 < %s | FileCheck --check-prefix=CHECK-BIG %s
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; Test that the tiny core architecture generates 3 slot packets at most and
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; a single load/store per packet at most.
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; CHECK: loop0(.LBB0_[[LOOP:.]],
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; CHECK: .LBB0_[[LOOP]]:
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; CHECK: {
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; CHECK-NEXT: mpy
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; CHECK-NOT: memw
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; CHECK: }
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; CHECK: {
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; CHECK: memw
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; CHECK-NOT: memw
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; CHECK: }
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; CHECK: {
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; CHECK: memw
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; CHECK-NOT: memw
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; CHECK: } :endloop0
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; Test the loop contains a single packet with 4 instructions.
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; CHECK-BIG: loop0(.LBB0_[[LOOP:.]],
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; CHECK-BIG: .LBB0_[[LOOP]]:
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; CHECK-BIG: {
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; CHECK-BIG: += mpyi
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; CHECK-BIG-NEXT: = combine
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; CHECK-BIG-NEXT: = memw
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; CHECK-BIG-NEXT: = memw
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; CHECK-BIG-NEXT: } :endloop0
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define i32 @test(ptr noalias nocapture readonly %a, ptr noalias nocapture readonly %b, i32 %n) local_unnamed_addr #0 {
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entry:
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%cmp8 = icmp sgt i32 %n, 0
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br i1 %cmp8, label %for.body, label %for.end
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for.body:
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%sum.010 = phi i32 [ %add, %for.body ], [ 0, %entry ]
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%arrayidx.phi = phi ptr [ %arrayidx.inc, %for.body ], [ %a, %entry ]
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%arrayidx1.phi = phi ptr [ %arrayidx1.inc, %for.body ], [ %b, %entry ]
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%i.09 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
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%0 = load i32, ptr %arrayidx.phi, align 4
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%1 = load i32, ptr %arrayidx1.phi, align 4
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%mul = mul nsw i32 %1, %0
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%add = add nsw i32 %mul, %sum.010
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%inc = add nuw nsw i32 %i.09, 1
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%exitcond = icmp eq i32 %inc, %n
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%arrayidx.inc = getelementptr i32, ptr %arrayidx.phi, i32 1
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%arrayidx1.inc = getelementptr i32, ptr %arrayidx1.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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%sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
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ret i32 %sum.0.lcssa
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}
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