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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s ; PR2967 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32" target triple = "i386-pc-linux-gnu" define void @test1(i32 %x) nounwind { ; CHECK-LABEL: @test1( ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = icmp eq i32 [[X:%.*]], 0 ; CHECK-NEXT: br i1 [[TMP0]], label [[BB:%.*]], label [[RETURN:%.*]] ; CHECK: bb: ; CHECK-NEXT: [[TMP1:%.*]] = load volatile i32, i32* null, align 4 ; CHECK-NEXT: unreachable ; CHECK: return: ; CHECK-NEXT: ret void ; entry: %0 = icmp eq i32 %x, 0 ; <i1> [#uses=1] br i1 %0, label %bb, label %return bb: ; preds = %entry %1 = load volatile i32, i32* null unreachable br label %return return: ; preds = %entry ret void } define void @test1_no_null_opt(i32 %x) nounwind #0 { ; CHECK-LABEL: @test1_no_null_opt( ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = icmp eq i32 [[X:%.*]], 0 ; CHECK-NEXT: br i1 [[TMP0]], label [[BB:%.*]], label [[RETURN:%.*]] ; CHECK: bb: ; CHECK-NEXT: [[TMP1:%.*]] = load volatile i32, i32* null, align 4 ; CHECK-NEXT: unreachable ; CHECK: return: ; CHECK-NEXT: ret void ; entry: %0 = icmp eq i32 %x, 0 ; <i1> [#uses=1] br i1 %0, label %bb, label %return bb: ; preds = %entry %1 = load volatile i32, i32* null unreachable br label %return return: ; preds = %entry ret void } ; rdar://7958343 define void @test2() nounwind { ; CHECK-LABEL: @test2( ; CHECK-NEXT: entry: ; CHECK-NEXT: call void @llvm.trap() ; CHECK-NEXT: unreachable ; entry: store i32 4,i32* null ret void } define void @test2_no_null_opt() nounwind #0 { ; CHECK-LABEL: @test2_no_null_opt( ; CHECK-NEXT: entry: ; CHECK-NEXT: store i32 4, i32* null, align 4 ; CHECK-NEXT: ret void ; entry: store i32 4,i32* null ret void } ; PR7369 define void @test3() nounwind { ; CHECK-LABEL: @test3( ; CHECK-NEXT: entry: ; CHECK-NEXT: store volatile i32 4, i32* null, align 4 ; CHECK-NEXT: ret void ; entry: store volatile i32 4, i32* null ret void } define void @test3_no_null_opt() nounwind #0 { ; CHECK-LABEL: @test3_no_null_opt( ; CHECK-NEXT: entry: ; CHECK-NEXT: store volatile i32 4, i32* null, align 4 ; CHECK-NEXT: ret void ; entry: store volatile i32 4, i32* null ret void } ; Check store before unreachable. define void @test4(i1 %C, i32* %P) { ; CHECK-LABEL: @test4( ; CHECK-NEXT: entry: ; CHECK-NEXT: br i1 [[C:%.*]], label [[T:%.*]], label [[F:%.*]] ; CHECK: T: ; CHECK-NEXT: store volatile i32 0, i32* [[P:%.*]], align 4 ; CHECK-NEXT: unreachable ; CHECK: F: ; CHECK-NEXT: ret void ; entry: br i1 %C, label %T, label %F T: store volatile i32 0, i32* %P unreachable F: ret void } ; Check cmpxchg before unreachable. define void @test5(i1 %C, i32* %P) { ; CHECK-LABEL: @test5( ; CHECK-NEXT: entry: ; CHECK-NEXT: br i1 [[C:%.*]], label [[T:%.*]], label [[F:%.*]] ; CHECK: T: ; CHECK-NEXT: [[TMP0:%.*]] = cmpxchg volatile i32* [[P:%.*]], i32 0, i32 1 seq_cst seq_cst, align 4 ; CHECK-NEXT: unreachable ; CHECK: F: ; CHECK-NEXT: ret void ; entry: br i1 %C, label %T, label %F T: cmpxchg volatile i32* %P, i32 0, i32 1 seq_cst seq_cst unreachable F: ret void } ; Check atomicrmw before unreachable. define void @test6(i1 %C, i32* %P) { ; CHECK-LABEL: @test6( ; CHECK-NEXT: entry: ; CHECK-NEXT: br i1 [[C:%.*]], label [[T:%.*]], label [[F:%.*]] ; CHECK: T: ; CHECK-NEXT: [[TMP0:%.*]] = atomicrmw volatile xchg i32* [[P:%.*]], i32 0 seq_cst, align 4 ; CHECK-NEXT: unreachable ; CHECK: F: ; CHECK-NEXT: ret void ; entry: br i1 %C, label %T, label %F T: atomicrmw volatile xchg i32* %P, i32 0 seq_cst unreachable F: ret void } attributes #0 = { null_pointer_is_valid }
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