42 lines
1.8 KiB
LLVM
42 lines
1.8 KiB
LLVM
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; RUN: opt -scalar-evolution -loop-deletion -simplifycfg -analyze -enable-new-pm=0 < %s | FileCheck %s --check-prefix=CHECK-ANALYSIS-1
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; RUN: opt "-passes=print<scalar-evolution>,loop(loop-deletion),simplifycfg" -disable-output < %s 2>&1 | FileCheck %s --check-prefix=CHECK-ANALYSIS-1
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; RUN: opt -analyze -enable-new-pm=0 -scalar-evolution < %s | FileCheck %s --check-prefix=CHECK-ANALYSIS-2
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; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s --check-prefix=CHECK-ANALYSIS-2
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define i32 @pr34538() local_unnamed_addr #0 {
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; CHECK-ANALYSIS-1: Loop %do.body: backedge-taken count is 10000
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; CHECK-ANALYSIS-1: Loop %do.body: max backedge-taken count is 10000
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; CHECK-ANALYSIS-1: Loop %do.body: Predicated backedge-taken count is 10000
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entry:
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br label %do.body
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do.body: ; preds = %do.body, %entry
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%start.0 = phi i32 [ 0, %entry ], [ %inc.start.0, %do.body ]
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%cmp = icmp slt i32 %start.0, 10000
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%inc = zext i1 %cmp to i32
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%inc.start.0 = add nsw i32 %start.0, %inc
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br i1 %cmp, label %do.body, label %do.end
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do.end: ; preds = %do.body
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ret i32 0
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}
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define i32 @foo() {
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entry:
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br label %do.body
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do.body: ; preds = %do.body, %entry
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%start.0 = phi i32 [ 0, %entry ], [ %inc.start.0, %do.body ]
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%cmp = icmp slt i32 %start.0, 10000
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%select_ext = select i1 %cmp, i32 2 , i32 1
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%inc.start.0 = add nsw i32 %start.0, %select_ext
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br i1 %cmp, label %do.body, label %do.end
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do.end: ; preds = %do.body
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ret i32 0
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; CHECK-ANALYSIS-2: Loop %do.body: backedge-taken count is 5000
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; CHECK-ANALYSIS-2: Loop %do.body: max backedge-taken count is 5000
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; CHECK-ANALYSIS-2: Loop %do.body: Predicated backedge-taken count is 5000
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}
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