fac9472593
Reland #171963, #172639 and #173444, they are reverted in 86b9f90b9574b3a7d15d28a91f6316459dcfa046 because of introducing non-determinism in compiles. The non-determinism has been fixed in 9b8addffa70cee5b2acc5454712d9cf78ce45710.
83 lines
3.7 KiB
LLVM
83 lines
3.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals
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; RUN: opt < %s -passes=mergeicmps -verify-dom-info -mtriple=x86_64-unknown-unknown -S | FileCheck %s
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%S = type { i32, i32, i32, i32 }
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; The entry block is part of the chain. It however can not be merged. We need to
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; make sure that the control flow is still consistent (goes through each of the
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; blocks).
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define zeroext i1 @opeq1(
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; CHECK-LABEL: @opeq1(
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; CHECK-NEXT: entry2:
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; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds [[S:%.*]], ptr [[A:%.*]], i64 0, i32 3
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; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [[S]], ptr [[B:%.*]], i64 0, i32 2
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; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[TMP0]], align 4
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; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[TMP1]], align 4
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; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i32 [[TMP2]], [[TMP3]]
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; CHECK-NEXT: br i1 [[TMP4]], label %"land.rhs.i+land.rhs.i.2", label [[OPEQ1_EXIT:%.*]], !prof [[PROF1:![0-9]+]]
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; CHECK: "land.rhs.i+land.rhs.i.2":
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; CHECK-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(ptr [[A]], ptr [[B]], i64 8)
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; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[MEMCMP]], 0
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; CHECK-NEXT: br i1 [[TMP5]], label [[LAND_RHS_I_31:%.*]], label [[OPEQ1_EXIT]], !prof [[PROF2:![0-9]+]]
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; CHECK: land.rhs.i.31:
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; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds [[S]], ptr [[A]], i64 0, i32 3
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; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds [[S]], ptr [[B]], i64 0, i32 3
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; CHECK-NEXT: [[TMP8:%.*]] = load i32, ptr [[TMP6]], align 4
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; CHECK-NEXT: [[TMP9:%.*]] = load i32, ptr [[TMP7]], align 4
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; CHECK-NEXT: [[TMP10:%.*]] = icmp eq i32 [[TMP8]], [[TMP9]]
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; CHECK-NEXT: br label [[OPEQ1_EXIT]]
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; CHECK: opeq1.exit:
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; CHECK-NEXT: [[TMP11:%.*]] = phi i1 [ false, [[ENTRY2:%.*]] ], [ false, %"land.rhs.i+land.rhs.i.2" ], [ [[TMP10]], [[LAND_RHS_I_31]] ]
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; CHECK-NEXT: ret i1 [[TMP11]]
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;
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ptr nocapture readonly dereferenceable(16) %a,
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ptr nocapture readonly dereferenceable(16) %b) local_unnamed_addr nofree nosync !prof !0 {
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entry:
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%first.i = getelementptr inbounds %S, ptr %a, i64 0, i32 3
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%0 = load i32, ptr %first.i, align 4
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%first1.i = getelementptr inbounds %S, ptr %b, i64 0, i32 2
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%1 = load i32, ptr %first1.i, align 4
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%cmp.i = icmp eq i32 %0, %1
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br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit, !prof !1
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land.rhs.i:
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%2 = load i32, ptr %a, align 4
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%3 = load i32, ptr %b, align 4
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%cmp3.i = icmp eq i32 %2, %3
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br i1 %cmp3.i, label %land.rhs.i.2, label %opeq1.exit, !prof !2
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land.rhs.i.2:
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%third.i = getelementptr inbounds %S, ptr %a, i64 0, i32 1
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%4 = load i32, ptr %third.i, align 4
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%third2.i = getelementptr inbounds %S, ptr %b, i64 0, i32 1
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%5 = load i32, ptr %third2.i, align 4
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%cmp4.i = icmp eq i32 %4, %5
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br i1 %cmp4.i, label %land.rhs.i.3, label %opeq1.exit, !prof !3
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land.rhs.i.3:
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%fourth.i = getelementptr inbounds %S, ptr %a, i64 0, i32 3
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%6 = load i32, ptr %fourth.i, align 4
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%fourth2.i = getelementptr inbounds %S, ptr %b, i64 0, i32 3
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%7 = load i32, ptr %fourth2.i, align 4
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%cmp5.i = icmp eq i32 %6, %7
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br label %opeq1.exit
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opeq1.exit:
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%8 = phi i1 [ false, %entry ], [ false, %land.rhs.i], [ false, %land.rhs.i.2 ], [ %cmp5.i, %land.rhs.i.3 ]
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ret i1 %8
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}
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!0 = !{!"function_entry_count", i32 10}
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!1 = !{!"branch_weights", i32 2, i32 3}
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!2 = !{!"branch_weights", i32 5, i32 7}
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!3 = !{!"branch_weights", i32 11, i32 13}
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;.
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; CHECK: attributes #[[ATTR0:[0-9]+]] = { nofree nosync }
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; CHECK: attributes #[[ATTR1:[0-9]+]] = { nocallback nofree nounwind willreturn memory(argmem: read) }
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;.
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; CHECK: [[META0:![0-9]+]] = !{!"function_entry_count", i32 10}
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; CHECK: [[PROF1]] = !{!"branch_weights", i32 2, i32 3}
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; CHECK: [[PROF2]] = !{!"branch_weights", i32 55, i32 233}
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;.
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