derek.holloway
7502bf64a4
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71 lines
2.5 KiB
LLVM
71 lines
2.5 KiB
LLVM
; RUN: opt < %s -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s
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define i32 @cmp1(ptr readnone %0, ptr readnone %1) {
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; CHECK-LABEL: 'cmp1'
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%3 = icmp eq ptr %0, %1
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br i1 %3, label %4, label %6
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; CHECK: edge %2 -> %4 probability is 0x30000000 / 0x80000000 = 37.50%
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; CHECK: edge %2 -> %6 probability is 0x50000000 / 0x80000000 = 62.50%
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4: ; preds = %2
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%5 = tail call i32 @f() #2
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br label %8
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; CHECK: edge %4 -> %8 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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6: ; preds = %2
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%7 = tail call i32 @g() #2
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br label %8
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; CHECK: edge %6 -> %8 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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8: ; preds = %6, %4
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%9 = phi i32 [ %5, %4 ], [ %7, %6 ]
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ret i32 %9
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}
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define i32 @cmp2(ptr readnone %0, ptr readnone %1) {
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; CHECK-LABEL: 'cmp2'
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%3 = icmp eq ptr %0, %1
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br i1 %3, label %6, label %4
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; CHECK: edge %2 -> %6 probability is 0x30000000 / 0x80000000 = 37.50%
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; CHECK: edge %2 -> %4 probability is 0x50000000 / 0x80000000 = 62.50%
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4: ; preds = %2
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%5 = tail call i32 @f() #2
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br label %8
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; CHECK: edge %4 -> %8 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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6: ; preds = %2
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%7 = tail call i32 @g() #2
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br label %8
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; CHECK: edge %6 -> %8 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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8: ; preds = %6, %4
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%9 = phi i32 [ %5, %4 ], [ %7, %6 ]
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ret i32 %9
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}
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define i32 @cmp3(ptr readnone %0) {
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; CHECK-LABEL: 'cmp3'
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%2 = icmp eq ptr %0, null
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br i1 %2, label %3, label %5
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; CHECK: edge %1 -> %3 probability is 0x30000000 / 0x80000000 = 37.50%
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; CHECK: edge %1 -> %5 probability is 0x50000000 / 0x80000000 = 62.50%
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3: ; preds = %1
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%4 = tail call i32 @f() #2
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br label %7
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; CHECK: edge %3 -> %7 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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5: ; preds = %1
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%6 = tail call i32 @g() #2
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br label %7
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; CHECK: edge %5 -> %7 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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7: ; preds = %5, %3
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%8 = phi i32 [ %6, %5 ], [ %4, %3 ]
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ret i32 %8
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}
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declare dso_local i32 @f(...) local_unnamed_addr #1
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declare dso_local i32 @g(...) local_unnamed_addr #1
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