derek.holloway
7502bf64a4
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45 lines
1.8 KiB
LLVM
45 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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;; The PHI node in this example should not be turned into a select, as we are
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;; not able to ifcvt the entire block. As such, converting to a select just
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;; introduces inefficiency without saving copies.
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define i32 @bar(i1 %C) {
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; CHECK-LABEL: @bar(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[C:%.*]], label [[THEN:%.*]], label [[ENDIF:%.*]]
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; CHECK: then:
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; CHECK-NEXT: [[TMP_3:%.*]] = call i32 @qux()
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; CHECK-NEXT: br label [[ENDIF]]
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; CHECK: endif:
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; CHECK-NEXT: [[R:%.*]] = phi i32 [ 123, [[ENTRY:%.*]] ], [ 12312, [[THEN]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = call i32 @qux()
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; CHECK-NEXT: [[TMP1:%.*]] = call i32 @qux()
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; CHECK-NEXT: [[TMP2:%.*]] = call i32 @qux()
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; CHECK-NEXT: [[TMP3:%.*]] = call i32 @qux()
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; CHECK-NEXT: [[TMP4:%.*]] = call i32 @qux()
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; CHECK-NEXT: [[TMP5:%.*]] = call i32 @qux()
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; CHECK-NEXT: [[TMP6:%.*]] = call i32 @qux()
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; CHECK-NEXT: ret i32 [[R]]
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;
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entry:
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br i1 %C, label %then, label %endif
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then: ; preds = %entry
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%tmp.3 = call i32 @qux( ) ; <i32> [#uses=0]
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br label %endif
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endif: ; preds = %then, %entry
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%R = phi i32 [ 123, %entry ], [ 12312, %then ] ; <i32> [#uses=1]
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;; stuff to disable tail duplication
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call i32 @qux( ) ; <i32>:0 [#uses=0]
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call i32 @qux( ) ; <i32>:1 [#uses=0]
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call i32 @qux( ) ; <i32>:2 [#uses=0]
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call i32 @qux( ) ; <i32>:3 [#uses=0]
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call i32 @qux( ) ; <i32>:4 [#uses=0]
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call i32 @qux( ) ; <i32>:5 [#uses=0]
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call i32 @qux( ) ; <i32>:6 [#uses=0]
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ret i32 %R
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}
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declare i32 @qux()
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