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47246e5e03
Some benchmarks regress with non-trivial unswitching, so add an option to opt-out of performing non-trivial unswitching while investigating. Reviewed By: asbirlea Differential Revision: https://reviews.llvm.org/D95796
75 lines
1.6 KiB
LLVM
75 lines
1.6 KiB
LLVM
; RUN: opt < %s -S -passes="default<O1>" | FileCheck %s -check-prefixes=TRIVIAL,CHECK
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; RUN: opt < %s -S -passes="default<O2>" | FileCheck %s -check-prefixes=TRIVIAL,CHECK
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; RUN: opt < %s -S -passes="default<O3>" | FileCheck %s -check-prefixes=NONTRIVIAL,CHECK
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; RUN: opt < %s -S -passes="default<O3>" -enable-npm-O3-nontrivial-unswitch=0 | FileCheck %s -check-prefixes=TRIVIAL,CHECK
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; RUN: opt < %s -S -passes="default<Os>" | FileCheck %s -check-prefixes=TRIVIAL,CHECK
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; RUN: opt < %s -S -passes="default<Oz>" | FileCheck %s -check-prefixes=TRIVIAL,CHECK
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declare i32 @a()
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declare i32 @b()
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declare i32 @c()
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; TRIVIAL-NOT: loop_begin.us:
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; NONTRIVIAL: loop_begin.us:
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define i32 @test1(i1* %ptr, i1 %cond1, i1 %cond2) {
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entry:
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br label %loop_begin
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loop_begin:
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br i1 %cond1, label %loop_a, label %loop_b
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loop_a:
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call i32 @a()
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br label %latch
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loop_b:
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br i1 %cond2, label %loop_b_a, label %loop_b_b
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loop_b_a:
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call i32 @b()
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br label %latch
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loop_b_b:
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call i32 @c()
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br label %latch
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latch:
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%v = load i1, i1* %ptr
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br i1 %v, label %loop_begin, label %loop_exit
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loop_exit:
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ret i32 0
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}
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; CHECK-NOT: loop2_begin.us:
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define i32 @test2(i1* %ptr, i1 %cond1, i1 %cond2) optsize {
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entry:
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br label %loop2_begin
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loop2_begin:
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br i1 %cond1, label %loop2_a, label %loop2_b
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loop2_a:
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call i32 @a()
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br label %latch2
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loop2_b:
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br i1 %cond2, label %loop2_b_a, label %loop2_b_b
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loop2_b_a:
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call i32 @b()
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br label %latch2
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loop2_b_b:
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call i32 @c()
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br label %latch2
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latch2:
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%v = load i1, i1* %ptr
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br i1 %v, label %loop2_begin, label %loop2_exit
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loop2_exit:
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ret i32 0
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}
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