derek.holloway
7502bf64a4
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46 lines
1.6 KiB
LLVM
46 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals --version 2
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; Test that hoisting conditional branches copies the debug and profiling info
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; metadata from the branch being hoisted.
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; RUN: opt -S -passes=licm %s -o - | FileCheck %s
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declare i32 @foo()
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; to_hoist should get hoisted, and that should not result
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; in a loss of profiling info
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define i32 @hoist_select(i1 %cond, i32 %a, i32 %b) nounwind {
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; CHECK-LABEL: define i32 @hoist_select
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; CHECK-SAME: (i1 [[COND:%.*]], i32 [[A:%.*]], i32 [[B:%.*]]) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TO_HOIST:%.*]] = select i1 [[COND]], i32 [[A]], i32 [[B]], !prof [[PROF0:![0-9]+]]
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; CHECK-NEXT: br label [[L0:%.*]]
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; CHECK: L0:
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; CHECK-NEXT: [[G:%.*]] = call i32 @foo()
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; CHECK-NEXT: [[SUM:%.*]] = add i32 [[G]], [[TO_HOIST]]
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[SUM]], 0
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; CHECK-NEXT: br i1 [[C]], label [[L0]], label [[EXIT:%.*]], !prof [[PROF1:![0-9]+]]
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; CHECK: exit:
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; CHECK-NEXT: [[SUM_LCSSA:%.*]] = phi i32 [ [[SUM]], [[L0]] ]
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; CHECK-NEXT: ret i32 [[SUM_LCSSA]]
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;
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entry:
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br label %L0
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L0:
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%g = call i32 @foo()
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%to_hoist = select i1 %cond, i32 %a, i32 %b, !prof !0
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%sum = add i32 %g, %to_hoist
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%c = icmp eq i32 %sum, 0
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br i1 %c, label %L0, label %exit, !prof !1
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exit:
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ret i32 %sum
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}
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!0 = !{!"branch_weights", i32 2, i32 5}
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!1 = !{!"branch_weights", i32 101, i32 189}
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;.
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; CHECK: attributes #[[ATTR0]] = { nounwind }
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;.
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; CHECK: [[PROF0]] = !{!"branch_weights", i32 2, i32 5}
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; CHECK: [[PROF1]] = !{!"branch_weights", i32 101, i32 189}
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;.
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