| ; RUN: llc < %s -march=x86-64 | FileCheck %s |
| |
| %struct.obj = type { i64 } |
| |
| ; CHECK: _Z7releaseP3obj |
| define void @_Z7releaseP3obj(%struct.obj* nocapture %o) nounwind uwtable ssp { |
| entry: |
| ; CHECK: decq (%{{rdi|rcx}}) |
| ; CHECK-NEXT: je |
| %refcnt = getelementptr inbounds %struct.obj* %o, i64 0, i32 0 |
| %0 = load i64* %refcnt, align 8, !tbaa !0 |
| %dec = add i64 %0, -1 |
| store i64 %dec, i64* %refcnt, align 8, !tbaa !0 |
| %tobool = icmp eq i64 %dec, 0 |
| br i1 %tobool, label %if.end, label %return |
| |
| if.end: ; preds = %entry |
| %1 = bitcast %struct.obj* %o to i8* |
| tail call void @free(i8* %1) |
| br label %return |
| |
| return: ; preds = %entry, %if.end |
| ret void |
| } |
| |
| @c = common global i64 0, align 8 |
| @a = common global i32 0, align 4 |
| @.str = private unnamed_addr constant [5 x i8] c"%ld\0A\00", align 1 |
| @b = common global i32 0, align 4 |
| |
| ; CHECK: test |
| define i32 @test() nounwind uwtable ssp { |
| entry: |
| ; CHECK: decq |
| ; CHECK-NOT: decq |
| %0 = load i64* @c, align 8, !tbaa !0 |
| %dec.i = add nsw i64 %0, -1 |
| store i64 %dec.i, i64* @c, align 8, !tbaa !0 |
| %tobool.i = icmp ne i64 %dec.i, 0 |
| %lor.ext.i = zext i1 %tobool.i to i32 |
| store i32 %lor.ext.i, i32* @a, align 4, !tbaa !3 |
| %call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([5 x i8]* @.str, i64 0, i64 0), i64 %dec.i) nounwind |
| ret i32 0 |
| } |
| |
| ; CHECK: test2 |
| define i32 @test2() nounwind uwtable ssp { |
| entry: |
| ; CHECK-NOT: decq ({{.*}}) |
| %0 = load i64* @c, align 8, !tbaa !0 |
| %dec.i = add nsw i64 %0, -1 |
| store i64 %dec.i, i64* @c, align 8, !tbaa !0 |
| %tobool.i = icmp ne i64 %0, 0 |
| %lor.ext.i = zext i1 %tobool.i to i32 |
| store i32 %lor.ext.i, i32* @a, align 4, !tbaa !3 |
| %call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([5 x i8]* @.str, i64 0, i64 0), i64 %dec.i) nounwind |
| ret i32 0 |
| } |
| |
| declare i32 @printf(i8* nocapture, ...) nounwind |
| |
| declare void @free(i8* nocapture) nounwind |
| |
| !0 = metadata !{metadata !"long", metadata !1} |
| !1 = metadata !{metadata !"omnipotent char", metadata !2} |
| !2 = metadata !{metadata !"Simple C/C++ TBAA", null} |
| !3 = metadata !{metadata !"int", metadata !1} |
| |
| %struct.obj2 = type { i64, i32, i16, i8 } |
| |
| declare void @other(%struct.obj2* ) nounwind; |
| |
| ; CHECK: example_dec |
| define void @example_dec(%struct.obj2* %o) nounwind uwtable ssp { |
| ; 64 bit dec |
| entry: |
| %s64 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 0 |
| ; CHECK-NOT: load |
| %0 = load i64* %s64, align 8 |
| ; CHECK: decq ({{.*}}) |
| %dec = add i64 %0, -1 |
| store i64 %dec, i64* %s64, align 8 |
| %tobool = icmp eq i64 %dec, 0 |
| br i1 %tobool, label %if.end, label %return |
| |
| ; 32 bit dec |
| if.end: |
| %s32 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 1 |
| ; CHECK-NOT: load |
| %1 = load i32* %s32, align 4 |
| ; CHECK: decl {{[0-9][0-9]*}}({{.*}}) |
| %dec1 = add i32 %1, -1 |
| store i32 %dec1, i32* %s32, align 4 |
| %tobool2 = icmp eq i32 %dec1, 0 |
| br i1 %tobool2, label %if.end1, label %return |
| |
| ; 16 bit dec |
| if.end1: |
| %s16 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 2 |
| ; CHECK-NOT: load |
| %2 = load i16* %s16, align 2 |
| ; CHECK: decw {{[0-9][0-9]*}}({{.*}}) |
| %dec2 = add i16 %2, -1 |
| store i16 %dec2, i16* %s16, align 2 |
| %tobool3 = icmp eq i16 %dec2, 0 |
| br i1 %tobool3, label %if.end2, label %return |
| |
| ; 8 bit dec |
| if.end2: |
| %s8 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 3 |
| ; CHECK-NOT: load |
| %3 = load i8* %s8 |
| ; CHECK: decb {{[0-9][0-9]*}}({{.*}}) |
| %dec3 = add i8 %3, -1 |
| store i8 %dec3, i8* %s8 |
| %tobool4 = icmp eq i8 %dec3, 0 |
| br i1 %tobool4, label %if.end4, label %return |
| |
| if.end4: |
| tail call void @other(%struct.obj2* %o) nounwind |
| br label %return |
| |
| return: ; preds = %if.end4, %if.end, %entry |
| ret void |
| } |
| |
| ; CHECK: example_inc |
| define void @example_inc(%struct.obj2* %o) nounwind uwtable ssp { |
| ; 64 bit inc |
| entry: |
| %s64 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 0 |
| ; CHECK-NOT: load |
| %0 = load i64* %s64, align 8 |
| ; CHECK: incq ({{.*}}) |
| %inc = add i64 %0, 1 |
| store i64 %inc, i64* %s64, align 8 |
| %tobool = icmp eq i64 %inc, 0 |
| br i1 %tobool, label %if.end, label %return |
| |
| ; 32 bit inc |
| if.end: |
| %s32 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 1 |
| ; CHECK-NOT: load |
| %1 = load i32* %s32, align 4 |
| ; CHECK: incl {{[0-9][0-9]*}}({{.*}}) |
| %inc1 = add i32 %1, 1 |
| store i32 %inc1, i32* %s32, align 4 |
| %tobool2 = icmp eq i32 %inc1, 0 |
| br i1 %tobool2, label %if.end1, label %return |
| |
| ; 16 bit inc |
| if.end1: |
| %s16 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 2 |
| ; CHECK-NOT: load |
| %2 = load i16* %s16, align 2 |
| ; CHECK: incw {{[0-9][0-9]*}}({{.*}}) |
| %inc2 = add i16 %2, 1 |
| store i16 %inc2, i16* %s16, align 2 |
| %tobool3 = icmp eq i16 %inc2, 0 |
| br i1 %tobool3, label %if.end2, label %return |
| |
| ; 8 bit inc |
| if.end2: |
| %s8 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 3 |
| ; CHECK-NOT: load |
| %3 = load i8* %s8 |
| ; CHECK: incb {{[0-9][0-9]*}}({{.*}}) |
| %inc3 = add i8 %3, 1 |
| store i8 %inc3, i8* %s8 |
| %tobool4 = icmp eq i8 %inc3, 0 |
| br i1 %tobool4, label %if.end4, label %return |
| |
| if.end4: |
| tail call void @other(%struct.obj2* %o) nounwind |
| br label %return |
| |
| return: |
| ret void |
| } |
| |
| ; Deal with TokenFactor chain |
| ; rdar://11236106 |
| @foo = external global i64*, align 8 |
| |
| define void @test3() nounwind ssp { |
| entry: |
| ; CHECK: test3: |
| ; CHECK: decq 16(%rax) |
| %0 = load i64** @foo, align 8 |
| %arrayidx = getelementptr inbounds i64* %0, i64 2 |
| %1 = load i64* %arrayidx, align 8 |
| %dec = add i64 %1, -1 |
| store i64 %dec, i64* %arrayidx, align 8 |
| %cmp = icmp eq i64 %dec, 0 |
| br i1 %cmp, label %if.then, label %if.end |
| |
| if.then: |
| tail call void @baz() nounwind |
| br label %if.end |
| |
| if.end: |
| ret void |
| } |
| |
| declare void @baz() |
| |
| ; Avoid creating a cycle in the DAG which would trigger an assert in the |
| ; scheduler. |
| ; PR12565 |
| ; rdar://11451474 |
| @x = external global i32, align 4 |
| @y = external global i32, align 4 |
| @z = external global i32, align 4 |
| |
| define void @test4() nounwind uwtable ssp { |
| entry: |
| %0 = load i32* @x, align 4 |
| %1 = load i32* @y, align 4 |
| %dec = add nsw i32 %1, -1 |
| store i32 %dec, i32* @y, align 4 |
| %tobool.i = icmp ne i32 %dec, 0 |
| %cond.i = select i1 %tobool.i, i32 %0, i32 0 |
| store i32 %cond.i, i32* @z, align 4 |
| ret void |
| } |
