101 lines
2.8 KiB
LLVM
101 lines
2.8 KiB
LLVM
; RUN: llc -outline-optional-branches -O2 < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-n32:64"
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target triple = "powerpc64le-grtev4-linux-gnu"
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; Intended layout:
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; The outlining flag produces the layout
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; test1
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; test2
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; test3
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; test4
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; exit
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; optional1
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; optional2
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; optional3
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; optional4
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; Tail duplication puts test n+1 at the end of optional n
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; so optional1 includes a copy of test2 at the end, and branches
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; to test3 (at the top) or falls through to optional 2.
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; The CHECK statements check for the whole string of tests and exit block,
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; and then check that the correct test has been duplicated into the end of
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; the optional blocks and that the optional blocks are in the correct order.
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;CHECK-LABEL: f:
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; test1 may have been merged with entry
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;CHECK: mr [[TAGREG:[0-9]+]], 3
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;CHECK: andi. {{[0-9]+}}, [[TAGREG]], 1
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;CHECK-NEXT: bc 12, 1, [[OPT1LABEL:[._0-9A-Za-z]+]]
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;CHECK-NEXT: [[TEST2LABEL:[._0-9A-Za-z]+]]: # %test2
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;CHECK-NEXT: rlwinm. {{[0-9]+}}, [[TAGREG]], 0, 30, 30
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;CHECK-NEXT: bne 0, [[OPT2LABEL:[._0-9A-Za-z]+]]
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;CHECK-NEXT: [[TEST3LABEL:[._0-9A-Za-z]+]]: # %test3
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;CHECK-NEXT: rlwinm. {{[0-9]+}}, [[TAGREG]], 0, 29, 29
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;CHECK-NEXT: bne 0, .[[OPT3LABEL:[._0-9A-Za-z]+]]
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;CHECK-NEXT: [[TEST4LABEL:[._0-9A-Za-z]+]]: # %test4
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;CHECK-NEXT: rlwinm. {{[0-9]+}}, [[TAGREG]], 0, 28, 28
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;CHECK-NEXT: bne 0, .[[OPT4LABEL:[._0-9A-Za-z]+]]
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;CHECK-NEXT: [[EXITLABEL:[._0-9A-Za-z]+]]: # %exit
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;CHECK: blr
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;CHECK-NEXT: [[OPT1LABEL]]
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;CHECK: rlwinm. {{[0-9]+}}, [[TAGREG]], 0, 30, 30
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;CHECK-NEXT: beq 0, [[TEST3LABEL]]
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;CHECK-NEXT: [[OPT2LABEL]]
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;CHECK: rlwinm. {{[0-9]+}}, [[TAGREG]], 0, 29, 29
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;CHECK-NEXT: beq 0, [[TEST4LABEL]]
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;CHECK-NEXT: [[OPT3LABEL]]
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;CHECK: rlwinm. {{[0-9]+}}, [[TAGREG]], 0, 28, 28
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;CHECK-NEXT: beq 0, [[EXITLABEL]]
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;CHECK-NEXT: [[OPT4LABEL]]
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;CHECK: b [[EXITLABEL]]
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define void @f(i32 %tag) {
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entry:
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br label %test1
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test1:
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%tagbit1 = and i32 %tag, 1
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%tagbit1eq0 = icmp eq i32 %tagbit1, 0
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br i1 %tagbit1eq0, label %test2, label %optional1
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optional1:
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call void @a()
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call void @a()
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call void @a()
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call void @a()
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br label %test2
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test2:
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%tagbit2 = and i32 %tag, 2
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%tagbit2eq0 = icmp eq i32 %tagbit2, 0
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br i1 %tagbit2eq0, label %test3, label %optional2
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optional2:
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call void @b()
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call void @b()
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call void @b()
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call void @b()
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br label %test3
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test3:
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%tagbit3 = and i32 %tag, 4
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%tagbit3eq0 = icmp eq i32 %tagbit3, 0
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br i1 %tagbit3eq0, label %test4, label %optional3
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optional3:
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call void @c()
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call void @c()
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call void @c()
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call void @c()
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br label %test4
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test4:
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%tagbit4 = and i32 %tag, 8
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%tagbit4eq0 = icmp eq i32 %tagbit4, 0
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br i1 %tagbit4eq0, label %exit, label %optional4
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optional4:
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call void @d()
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call void @d()
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call void @d()
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call void @d()
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br label %exit
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exit:
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ret void
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}
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declare void @a()
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declare void @b()
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declare void @c()
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declare void @d()
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