1662c200a5
Make this dependent only on the minsize attribute and drop the pipeline handling. Rename the enable-loop-header-duplication option to enable-loop-header-duplication-at-minsize to clarify that it controls header duplication at minsize only (in other cases it is enabled by default, independently of this option).
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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