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 3 4%S = type { i32, i32, i32, i32 } 5 6; The entry block is part of the chain. It however can not be merged. We need to 7; make sure that the control flow is still consistent (goes through each of the 8; blocks). 9 10define zeroext i1 @opeq1( 11; CHECK-LABEL: @opeq1( 12; CHECK-NEXT: entry2: 13; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds [[S:%.*]], ptr [[A:%.*]], i64 0, i32 3 14; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [[S]], ptr [[B:%.*]], i64 0, i32 2 15; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[TMP0]], align 4 16; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[TMP1]], align 4 17; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i32 [[TMP2]], [[TMP3]] 18; CHECK-NEXT: br i1 [[TMP4]], label %"land.rhs.i+land.rhs.i.2", label [[OPEQ1_EXIT:%.*]] 19; CHECK: "land.rhs.i+land.rhs.i.2": 20; CHECK-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(ptr [[A]], ptr [[B]], i64 8) 21; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[MEMCMP]], 0 22; CHECK-NEXT: br i1 [[TMP5]], label [[LAND_RHS_I_31:%.*]], label [[OPEQ1_EXIT]] 23; CHECK: land.rhs.i.31: 24; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds [[S]], ptr [[A]], i64 0, i32 3 25; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds [[S]], ptr [[B]], i64 0, i32 3 26; CHECK-NEXT: [[TMP8:%.*]] = load i32, ptr [[TMP6]], align 4 27; CHECK-NEXT: [[TMP9:%.*]] = load i32, ptr [[TMP7]], align 4 28; CHECK-NEXT: [[TMP10:%.*]] = icmp eq i32 [[TMP8]], [[TMP9]] 29; CHECK-NEXT: br label [[OPEQ1_EXIT]] 30; CHECK: opeq1.exit: 31; CHECK-NEXT: [[TMP11:%.*]] = phi i1 [ [[TMP10]], [[LAND_RHS_I_31]] ], [ false, %"land.rhs.i+land.rhs.i.2" ], [ false, [[ENTRY2:%.*]] ] 32; CHECK-NEXT: ret i1 [[TMP11]] 33; 34 ptr nocapture readonly dereferenceable(16) %a, 35 ptr nocapture readonly dereferenceable(16) %b) local_unnamed_addr nofree nosync { 36entry: 37 %first.i = getelementptr inbounds %S, ptr %a, i64 0, i32 3 38 %0 = load i32, ptr %first.i, align 4 39 %first1.i = getelementptr inbounds %S, ptr %b, i64 0, i32 2 40 %1 = load i32, ptr %first1.i, align 4 41 %cmp.i = icmp eq i32 %0, %1 42 br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit 43 44land.rhs.i: 45 %2 = load i32, ptr %a, align 4 46 %3 = load i32, ptr %b, align 4 47 %cmp3.i = icmp eq i32 %2, %3 48 br i1 %cmp3.i, label %land.rhs.i.2, label %opeq1.exit 49 50land.rhs.i.2: 51 %third.i = getelementptr inbounds %S, ptr %a, i64 0, i32 1 52 %4 = load i32, ptr %third.i, align 4 53 %third2.i = getelementptr inbounds %S, ptr %b, i64 0, i32 1 54 %5 = load i32, ptr %third2.i, align 4 55 %cmp4.i = icmp eq i32 %4, %5 56 br i1 %cmp4.i, label %land.rhs.i.3, label %opeq1.exit 57 58land.rhs.i.3: 59 %fourth.i = getelementptr inbounds %S, ptr %a, i64 0, i32 3 60 %6 = load i32, ptr %fourth.i, align 4 61 %fourth2.i = getelementptr inbounds %S, ptr %b, i64 0, i32 3 62 %7 = load i32, ptr %fourth2.i, align 4 63 %cmp5.i = icmp eq i32 %6, %7 64 br label %opeq1.exit 65 66opeq1.exit: 67 %8 = phi i1 [ false, %entry ], [ false, %land.rhs.i], [ false, %land.rhs.i.2 ], [ %cmp5.i, %land.rhs.i.3 ] 68 ret i1 %8 69} 70