4d5d2ffd3e
When there is no target-specific lowering of @llvm.cond.loop, it is lowered into a simple loop by PreISelIntrinsicLowering. Mark the branch weights into the no-return loop as unknown given we do not have value metadata to fix the profcheck test for this feature. Reviewers: mtrofin, alanzhao1, snehasish, pcc Pull Request: https://github.com/llvm/llvm-project/pull/180390
34 lines
1.3 KiB
LLVM
34 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; REQUIRES: x86-registered-target, mips-registered-target
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; RUN: opt -mtriple=x86_64 -passes=pre-isel-intrinsic-lowering -S < %s | FileCheck --check-prefix=X86 %s
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; RUN: opt -mtriple=mips64 -passes=pre-isel-intrinsic-lowering -S < %s | FileCheck --check-prefix=MIPS %s
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define void @f1(i64 %a, i64 %b) !prof !0 {
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; X86-LABEL: define void @f1(
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; X86-SAME: i64 [[A:%.*]], i64 [[B:%.*]]) !prof [[PROF0:![0-9]+]] {
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; X86-NEXT: [[CMP:%.*]] = icmp ult i64 [[A]], [[B]]
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; X86-NEXT: call void @llvm.cond.loop(i1 [[CMP]])
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; X86-NEXT: ret void
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;
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; MIPS-LABEL: define void @f1(
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; MIPS-SAME: i64 [[A:%.*]], i64 [[B:%.*]]) !prof [[PROF0:![0-9]+]] {
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; MIPS-NEXT: [[CMP:%.*]] = icmp ult i64 [[A]], [[B]]
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; MIPS-NEXT: br i1 [[CMP]], label %[[BB1:.*]], label %[[BB2:.*]], !prof [[PROF1:![0-9]+]]
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; MIPS: [[BB1]]:
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; MIPS-NEXT: br label %[[BB1]]
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; MIPS: [[BB2]]:
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; MIPS-NEXT: ret void
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;
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%cmp = icmp ult i64 %a, %b
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call void @llvm.cond.loop(i1 %cmp)
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ret void
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}
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!0 = !{!"function_entry_count", i64 1000}
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;.
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; X86: [[PROF0]] = !{!"function_entry_count", i64 1000}
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;.
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; MIPS: [[PROF0]] = !{!"function_entry_count", i64 1000}
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; MIPS: [[PROF1]] = !{!"unknown", !"pre-isel-intrinsic-lowering"}
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;.
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