derek.holloway
7502bf64a4
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58 lines
1.5 KiB
LLVM
58 lines
1.5 KiB
LLVM
; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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;CHECK: @foo
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;CHECK: and i32 %c1, %k
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;CHECK: icmp eq i32
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;CHECK: and i32 %c2, %k
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;CHECK: icmp eq i32
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;CHECK: select i1 {{.*}}, i1 true,
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;CHECK: ret
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define i32 @foo(i32 %k, i32 %c1, i32 %c2) {
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%1 = and i32 %c1, %k
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%2 = icmp eq i32 %1, 0
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br i1 %2, label %8, label %3
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; <label>:3 ; preds = %0
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%4 = and i32 %c2, %k
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%5 = icmp eq i32 %4, 0
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br i1 %5, label %8, label %6
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; <label>:6 ; preds = %3
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%7 = tail call i32 (...) @bar() nounwind
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br label %8
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; <label>:8 ; preds = %3, %0, %6
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ret i32 undef
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}
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;CHECK: @conduse
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;CHECK: shl i32 1, %c1
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;CHECK-NEXT: shl i32 1, %c2
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;CHECK-NEXT: and i32
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;CHECK-NEXT: icmp eq i32
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;CHECK-NEXT: and i32
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;CHECK-NEXT: icmp eq i32
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;CHECK: ret
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define i32 @conduse(i32 %k, i32 %c1, i32 %c2) #0 {
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bb:
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%tmp = shl i32 1, %c1
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%tmp4 = shl i32 1, %c2
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%tmp1 = and i32 %tmp, %k
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%tmp2 = icmp eq i32 %tmp1, 0
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br i1 %tmp2, label %bb9, label %bb3
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bb3: ; preds = %bb
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%tmp5 = and i32 %tmp4, %k
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%tmp6 = icmp eq i32 %tmp5, 0
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br i1 %tmp6, label %bb9, label %bb7
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bb7: ; preds = %bb3
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%tmp8 = tail call i32 (...) @bar() #1
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br label %bb9
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bb9: ; preds = %bb7, %bb3, %bb
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ret i32 undef
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}
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declare i32 @bar(...)
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