1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=mergeicmps -verify-dom-info -mtriple=x86_64-unknown-unknown -S | FileCheck %s --check-prefix=X86 3 4%S = type { i32, i32, i32, i32 } 5 6declare void @foo(...) 7 8; We can discard %entry and %land.rhs.i, but still merge the last 2 blocks. 9define zeroext i1 @opeq1( 10; X86-LABEL: @opeq1( 11; X86-NEXT: entry: 12; X86-NEXT: [[TMP0:%.*]] = load i32, ptr [[A:%.*]], align 4 13; X86-NEXT: [[TMP1:%.*]] = load i32, ptr [[B:%.*]], align 4 14; X86-NEXT: call void (...) @foo() 15; X86-NEXT: [[CMP_I:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]] 16; X86-NEXT: br i1 [[CMP_I]], label [[LAND_RHS_I:%.*]], label [[OPEQ1_EXIT:%.*]] 17; X86: land.rhs.i: 18; X86-NEXT: [[SECOND_I:%.*]] = getelementptr inbounds [[S:%.*]], ptr [[A]], i64 0, i32 1 19; X86-NEXT: [[TMP2:%.*]] = load i32, ptr [[SECOND_I]], align 4 20; X86-NEXT: [[SECOND2_I:%.*]] = getelementptr inbounds [[S]], ptr [[B]], i64 0, i32 1 21; X86-NEXT: [[TMP3:%.*]] = load i32, ptr [[SECOND2_I]], align 4 22; X86-NEXT: call void (...) @foo() 23; X86-NEXT: [[CMP2_I:%.*]] = icmp eq i32 [[TMP2]], [[TMP3]] 24; X86-NEXT: br i1 [[CMP2_I]], label %"land.rhs.i.2+land.rhs.i.3", label [[OPEQ1_EXIT]] 25; X86: "land.rhs.i.2+land.rhs.i.3": 26; X86-NEXT: [[TMP4:%.*]] = getelementptr inbounds [[S]], ptr [[A]], i64 0, i32 2 27; X86-NEXT: [[TMP5:%.*]] = getelementptr inbounds [[S]], ptr [[B]], i64 0, i32 2 28; X86-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(ptr [[TMP4]], ptr [[TMP5]], i64 8) 29; X86-NEXT: [[TMP6:%.*]] = icmp eq i32 [[MEMCMP]], 0 30; X86-NEXT: br label [[OPEQ1_EXIT]] 31; X86: opeq1.exit: 32; X86-NEXT: [[TMP7:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ false, [[LAND_RHS_I]] ], [ [[TMP6]], %"land.rhs.i.2+land.rhs.i.3" ] 33; X86-NEXT: ret i1 [[TMP7]] 34; 35 ptr nocapture readonly dereferenceable(16) %a, 36 ptr nocapture readonly dereferenceable(16) %b) local_unnamed_addr nofree nosync { 37entry: 38 %0 = load i32, ptr %a, align 4 39 %1 = load i32, ptr %b, align 4 40 ; Does other work. 41 call void (...) @foo() 42 %cmp.i = icmp eq i32 %0, %1 43 br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit 44 45land.rhs.i: 46 %second.i = getelementptr inbounds %S, ptr %a, i64 0, i32 1 47 %2 = load i32, ptr %second.i, align 4 48 %second2.i = getelementptr inbounds %S, ptr %b, i64 0, i32 1 49 %3 = load i32, ptr %second2.i, align 4 50 ; Does other work. 51 call void (...) @foo() 52 %cmp2.i = icmp eq i32 %2, %3 53 br i1 %cmp2.i, label %land.rhs.i.2, label %opeq1.exit 54 55land.rhs.i.2: 56 %third.i = getelementptr inbounds %S, ptr %a, i64 0, i32 2 57 %4 = load i32, ptr %third.i, align 4 58 %third2.i = getelementptr inbounds %S, ptr %b, i64 0, i32 2 59 %5 = load i32, ptr %third2.i, align 4 60 %cmp3.i = icmp eq i32 %4, %5 61 br i1 %cmp3.i, label %land.rhs.i.3, label %opeq1.exit 62 63land.rhs.i.3: 64 %fourth.i = getelementptr inbounds %S, ptr %a, i64 0, i32 3 65 %6 = load i32, ptr %fourth.i, align 4 66 %fourth2.i = getelementptr inbounds %S, ptr %b, i64 0, i32 3 67 %7 = load i32, ptr %fourth2.i, align 4 68 %cmp4.i = icmp eq i32 %6, %7 69 br label %opeq1.exit 70 71opeq1.exit: 72 %8 = phi i1 [ false, %entry ], [ false, %land.rhs.i] , [ false, %land.rhs.i.2 ], [ %cmp4.i, %land.rhs.i.3 ] 73 ret i1 %8 74} 75