c23b4fbdbb
Now that #149310 has restricted lifetime intrinsics to only work on allocas, we can also drop the explicit size argument. Instead, the size is implied by the alloca. This removes the ability to only mark a prefix of an alloca alive/dead. We never used that capability, so we should remove the need to handle that possibility everywhere (though many key places, including stack coloring, did not actually respect this).
145 lines
5.6 KiB
LLVM
145 lines
5.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
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; RUN: opt -O2 -S < %s | FileCheck %s
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;
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; Source code:
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; typedef unsigned long u64;
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; void foo(char *data, int idx, u64 *);
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; int test(int len, char *data) {
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; if (len < 100) {
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; for (int i = 1; i < len; i++) {
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; u64 d[1];
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; d[0] = data[0] ?: '0';
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; foo("%c", i, d);
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; }
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; }
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; return 0;
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; }
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; Compilation flag:
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; clang -target bpf -O2 -S -emit-llvm -Xclang -disable-llvm-passes test.c
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; ModuleID = 'test.c'
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source_filename = "test.c"
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target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128"
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target triple = "bpf"
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@.str = private unnamed_addr constant [3 x i8] c"%c\00", align 1
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; Function Attrs: nounwind
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define dso_local i32 @test(i32 %len, ptr %data) #0 {
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; CHECK-LABEL: define dso_local noundef i32 @test(
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; CHECK-SAME: i32 [[LEN:%.*]], ptr readonly captures(none) [[DATA:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[D:%.*]] = alloca [1 x i64], align 8
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; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[LEN]], -2
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; CHECK-NEXT: [[OR_COND:%.*]] = icmp ult i32 [[TMP0]], 98
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; CHECK-NEXT: br i1 [[OR_COND]], label [[FOR_BODY:%.*]], label [[IF_END:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_BODY]] ], [ 1, [[ENTRY:%.*]] ]
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[D]]) #[[ATTR3:[0-9]+]]
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; CHECK-NEXT: [[TMP1:%.*]] = load i8, ptr [[DATA]], align 1, !tbaa [[TBAA3:![0-9]+]]
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; CHECK-NEXT: [[TOBOOL_NOT:%.*]] = icmp eq i8 [[TMP1]], 0
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; CHECK-NEXT: [[NARROW:%.*]] = select i1 [[TOBOOL_NOT]], i8 48, i8 [[TMP1]]
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; CHECK-NEXT: [[CONV2:%.*]] = sext i8 [[NARROW]] to i64
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; CHECK-NEXT: store i64 [[CONV2]], ptr [[D]], align 8, !tbaa [[TBAA6:![0-9]+]]
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; CHECK-NEXT: call void @foo(ptr nonnull @.str, i32 [[I_05]], ptr nonnull [[D]]) #[[ATTR3]]
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[D]]) #[[ATTR3]]
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_05]], 1
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; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[INC]], [[LEN]]
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; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[IF_END]], label [[FOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
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; CHECK: if.end:
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; CHECK-NEXT: ret i32 0
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;
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entry:
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%len.addr = alloca i32, align 4
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%data.addr = alloca ptr, align 8
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%i = alloca i32, align 4
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%d = alloca [1 x i64], align 8
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store i32 %len, ptr %len.addr, align 4, !tbaa !3
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store ptr %data, ptr %data.addr, align 8, !tbaa !7
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%0 = load i32, ptr %len.addr, align 4, !tbaa !3
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%cmp = icmp slt i32 %0, 100
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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call void @llvm.lifetime.start.p0(ptr %i) #3
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store i32 1, ptr %i, align 4, !tbaa !3
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br label %for.cond
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for.cond: ; preds = %for.inc, %if.then
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%1 = load i32, ptr %i, align 4, !tbaa !3
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%2 = load i32, ptr %len.addr, align 4, !tbaa !3
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%cmp1 = icmp slt i32 %1, %2
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br i1 %cmp1, label %for.body, label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond
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call void @llvm.lifetime.end.p0(ptr %i) #3
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br label %for.end
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for.body: ; preds = %for.cond
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call void @llvm.lifetime.start.p0(ptr %d) #3
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%3 = load ptr, ptr %data.addr, align 8, !tbaa !7
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%4 = load i8, ptr %3, align 1, !tbaa !9
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%conv = sext i8 %4 to i32
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%tobool = icmp ne i32 %conv, 0
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br i1 %tobool, label %cond.true, label %cond.false
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cond.true: ; preds = %for.body
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br label %cond.end
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cond.false: ; preds = %for.body
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br label %cond.end
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cond.end: ; preds = %cond.false, %cond.true
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%cond = phi i32 [ %conv, %cond.true ], [ 48, %cond.false ]
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%conv2 = sext i32 %cond to i64
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store i64 %conv2, ptr %d, align 8, !tbaa !10
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%5 = load i32, ptr %i, align 4, !tbaa !3
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call void @foo(ptr @.str, i32 %5, ptr %d)
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call void @llvm.lifetime.end.p0(ptr %d) #3
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br label %for.inc
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for.inc: ; preds = %cond.end
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%6 = load i32, ptr %i, align 4, !tbaa !3
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%inc = add nsw i32 %6, 1
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store i32 %inc, ptr %i, align 4, !tbaa !3
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br label %for.cond, !llvm.loop !12
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for.end: ; preds = %for.cond.cleanup
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br label %if.end
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if.end: ; preds = %for.end, %entry
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ret i32 0
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}
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; Function Attrs: argmemonly nofree nosync nounwind willreturn
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declare void @llvm.lifetime.start.p0(ptr nocapture) #1
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declare dso_local void @foo(ptr, i32, ptr) #2
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; Function Attrs: argmemonly nofree nosync nounwind willreturn
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declare void @llvm.lifetime.end.p0(ptr nocapture) #1
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attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
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attributes #1 = { argmemonly nofree nosync nounwind willreturn }
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attributes #2 = { "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
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attributes #3 = { nounwind }
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!llvm.module.flags = !{!0, !1}
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!llvm.ident = !{!2}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{i32 7, !"frame-pointer", i32 2}
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!2 = !{!"clang version 14.0.0 (https://github.com/llvm/llvm-project.git 8385de118443144518c9fba8b3d831d9076e746b)"}
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!3 = !{!4, !4, i64 0}
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!4 = !{!"int", !5, i64 0}
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!5 = !{!"omnipotent char", !6, i64 0}
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!6 = !{!"Simple C/C++ TBAA"}
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!7 = !{!8, !8, i64 0}
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!8 = !{!"any pointer", !5, i64 0}
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!9 = !{!5, !5, i64 0}
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!10 = !{!11, !11, i64 0}
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!11 = !{!"long", !5, i64 0}
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!12 = distinct !{!12, !13}
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!13 = !{!"llvm.loop.mustprogress"}
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