derek.holloway
7502bf64a4
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95 lines
2.1 KiB
LLVM
95 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=jump-threading -S < %s | FileCheck %s
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declare void @f()
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declare void @f2()
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declare void @f3()
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; br on cond.fr should be removed & ENTRY -> A -> B should be threaded
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define i32 @simple(i1 %cond) {
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; CHECK-LABEL: @simple(
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; CHECK-NEXT: ENTRY:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[B:%.*]], label [[EXIT:%.*]]
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; CHECK: B:
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; CHECK-NEXT: call void @f()
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; CHECK-NEXT: ret i32 1
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; CHECK: EXIT:
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; CHECK-NEXT: ret i32 0
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;
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ENTRY:
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%cond.fr = freeze i1 %cond
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br i1 %cond, label %A, label %EXIT
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A:
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br i1 %cond.fr, label %B, label %EXIT
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B:
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call void @f()
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ret i32 1
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EXIT:
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ret i32 0
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}
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define void @switch(i32 %cond) {
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; CHECK-LABEL: @switch(
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; CHECK-NEXT: ENTRY:
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; CHECK-NEXT: [[COND_FR:%.*]] = freeze i32 [[COND:%.*]]
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; CHECK-NEXT: switch i32 [[COND]], label [[DEFAULT:%.*]] [
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; CHECK-NEXT: i32 0, label [[A_TAKEN:%.*]]
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; CHECK-NEXT: i32 1, label [[B_TAKEN:%.*]]
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; CHECK-NEXT: ]
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; CHECK: DEFAULT:
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; CHECK-NEXT: switch i32 [[COND_FR]], label [[PRESERVED1:%.*]] [
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; CHECK-NEXT: i32 0, label [[PRESERVED2:%.*]]
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; CHECK-NEXT: ]
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; CHECK: PRESERVED1:
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; CHECK-NEXT: call void @f()
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; CHECK-NEXT: ret void
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; CHECK: PRESERVED2:
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; CHECK-NEXT: call void @f2()
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; CHECK-NEXT: ret void
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; CHECK: A_TAKEN:
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; CHECK-NEXT: call void @f()
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; CHECK-NEXT: ret void
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; CHECK: B_TAKEN:
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; CHECK-NEXT: call void @f()
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; CHECK-NEXT: ret void
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;
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ENTRY:
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%cond.fr = freeze i32 %cond
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switch i32 %cond, label %DEFAULT [
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i32 0, label %A
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i32 1, label %B
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]
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DEFAULT:
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switch i32 %cond.fr, label %PRESERVED1 [
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i32 0, label %PRESERVED2
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]
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PRESERVED1:
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call void @f()
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ret void
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PRESERVED2:
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call void @f2()
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ret void
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A:
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switch i32 %cond.fr, label %A_NOTTAKEN [
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i32 0, label %A_TAKEN
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]
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A_TAKEN:
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call void @f()
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ret void
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A_NOTTAKEN:
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call void @f2()
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ret void
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B:
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switch i32 %cond.fr, label %B_TAKEN [
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i32 0, label %B_NOTTAKEN
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]
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B_TAKEN:
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call void @f()
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ret void
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B_NOTTAKEN:
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call void @f2()
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ret void
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}
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