derek.holloway
7502bf64a4
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37 lines
1.3 KiB
LLVM
37 lines
1.3 KiB
LLVM
; RUN: opt < %s -passes="print<branch-prob>,instcombine,print<branch-prob>" -S 2>&1 | FileCheck %s
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; CHECK: Printing analysis 'Branch Probability Analysis' for function 'invert_cond':
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; CHECK-NEXT: ---- Branch Probabilities ----
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; CHECK-NEXT: edge %entry -> %bb1 probability is 0x06186186 / 0x80000000 = 4.76%
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; CHECK-NEXT: edge %entry -> %bb2 probability is 0x79e79e7a / 0x80000000 = 95.24% [HOT edge]
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; CHECK-NEXT: Printing analysis 'Branch Probability Analysis' for function 'invert_cond':
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; CHECK-NEXT: ---- Branch Probabilities ----
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; CHECK-NEXT: edge %entry -> %bb2 probability is 0x79e79e7a / 0x80000000 = 95.24% [HOT edge]
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; CHECK-NEXT: edge %entry -> %bb1 probability is 0x06186186 / 0x80000000 = 4.76%
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define i32 @invert_cond(ptr %p) {
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; CHECK-LABEL: define i32 @invert_cond(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[COND_NOT:%.*]] = icmp eq ptr [[P]], null
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; CHECK-NEXT: br i1 [[COND_NOT]], label [[BB2:%.*]], label [[BB1:%.*]], !prof [[PROF0:![0-9]+]]
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; CHECK: bb1:
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; CHECK-NEXT: ret i32 0
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; CHECK: bb2:
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; CHECK-NEXT: ret i32 1
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;
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entry:
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%cond = icmp ne ptr %p, null
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br i1 %cond, label %bb1, label %bb2, !prof !1
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bb1:
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ret i32 0;
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bb2:
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ret i32 1;
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}
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!1 = !{!"branch_weights", i32 1, i32 20}
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; CHECK: [[PROF0]] = !{!"branch_weights", i32 20, i32 1}
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