derek.holloway
7502bf64a4
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55 lines
1.4 KiB
LLVM
55 lines
1.4 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt < %s -S -O2 -debug -debug-only=loop-rotate 2>&1 | FileCheck %s --check-prefixes=CHECK,DEFAULT
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; RUN: opt < %s -S -passes='default<O2>' -debug -debug-only=loop-rotate 2>&1 | FileCheck %s --check-prefixes=CHECK,DEFAULT
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;; Make sure -enable-loop-header-duplication-at-minsize overrides the default behavior at Oz
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; RUN: opt < %s -S -passes='default<O2>' -enable-loop-header-duplication-at-minsize -debug -debug-only=loop-rotate 2>&1 | FileCheck %s -check-prefixes=CHECK,ALLOW
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; optsize loop should always be rotated.
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; CHECK: rotating Loop at depth 1
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; minsize loop should only be rotated under the option.
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; DEFAULT-NOT: rotating Loop at depth 1
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; ALLOW: rotating Loop at depth 1
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@e = global i32 10
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declare void @use(i32)
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define void @test_optsize() optsize {
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entry:
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%end = load i32, ptr @e
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br label %loop
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loop:
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%n.phi = phi i32 [ %n, %loop.fin ], [ 0, %entry ]
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%cond = icmp eq i32 %n.phi, %end
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br i1 %cond, label %exit, label %loop.fin
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loop.fin:
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%n = add i32 %n.phi, 1
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call void @use(i32 %n)
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br label %loop
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exit:
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ret void
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}
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define void @test_minsize() minsize {
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entry:
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%end = load i32, ptr @e
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br label %loop
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loop:
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%n.phi = phi i32 [ %n, %loop.fin ], [ 0, %entry ]
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%cond = icmp eq i32 %n.phi, %end
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br i1 %cond, label %exit, label %loop.fin
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loop.fin:
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%n = add i32 %n.phi, 1
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call void @use(i32 %n)
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br label %loop
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exit:
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ret void
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}
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