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).
97 lines
3.4 KiB
LLVM
97 lines
3.4 KiB
LLVM
; RUN: opt -passes='loop-mssa(licm),print<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s
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; REQUIRES: asserts
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@arr = global [12 x i8] [i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12], align 1
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; CHECK-LABEL: @func()
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define void @func() {
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entry:
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%res.addr.i = alloca i8, align 1
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%sum = alloca i8, align 1
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%n = alloca i8, align 1
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%i = alloca i8, align 1
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%cleanup.dest.slot = alloca i32, align 1
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call void @llvm.lifetime.start.p0(ptr %sum) #3
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store i8 0, ptr %sum, align 1
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call void @llvm.lifetime.start.p0(ptr %n) #3
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%call = call i8 @idi(i8 10)
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store i8 %call, ptr %n, align 1
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call void @llvm.lifetime.start.p0(ptr %i) #3
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store i8 0, ptr %i, align 1
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%0 = load i8, ptr %i, align 1
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%1 = load i8, ptr %n, align 1
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%cmp = icmp slt i8 %0, %1
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond
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store i32 2, ptr %cleanup.dest.slot, align 1
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br label %final.cleanup
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for.body: ; preds = %for.cond
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%2 = load i8, ptr %i, align 1
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%idxprom = sext i8 %2 to i32
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%arrayidx = getelementptr inbounds [12 x i8], ptr @arr, i32 0, i32 %idxprom
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%3 = load i8, ptr %arrayidx, align 1
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%cmp1 = icmp eq i8 %3, 3
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br i1 %cmp1, label %if.then, label %if.end
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if.then: ; preds = %for.body
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store i32 2, ptr %cleanup.dest.slot, align 1
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br label %final.cleanup
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if.end: ; preds = %for.body
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%4 = load i8, ptr %i, align 1
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%idxprom2 = sext i8 %4 to i32
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%arrayidx3 = getelementptr inbounds [12 x i8], ptr @arr, i32 0, i32 %idxprom2
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%5 = load i8, ptr %arrayidx3, align 1
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%6 = load i8, ptr %sum, align 1
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%add = add nsw i8 %6, %5
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store i8 %add, ptr %sum, align 1
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br label %for.inc
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for.inc: ; preds = %if.end
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%7 = load i8, ptr %i, align 1
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%inc = add nsw i8 %7, 1
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store i8 %inc, ptr %i, align 1
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br label %for.cond
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; CHECK: final.cleanup:
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; CHECK-NEXT: ; [[NO20:.*]] = MemoryPhi({if.then,[[NO9:.*]]},{for.cond.cleanup,[[NO8:.*]]})
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; CHECK-NEXT: ; [[NO12:.*]] = MemoryDef([[NO20]])
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr %i)
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final.cleanup: ; preds = %if.then, %for.cond.cleanup
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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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; CHECK: for.end:
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; CHECK-NEXT: ; MemoryUse([[NO20]])
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; CHECK-NEXT: %3 = load i8, ptr %sum, align 1
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for.end: ; preds = %final.cleanup
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%8 = load i8, ptr %sum, align 1
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call void @llvm.lifetime.start.p0(ptr %res.addr.i)
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store i8 %8, ptr %res.addr.i, align 1
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%9 = load i8, ptr %res.addr.i, align 1
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call void @foo(i8 %9) #3
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call void @llvm.lifetime.end.p0(ptr %res.addr.i)
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call void @llvm.lifetime.end.p0(ptr %n) #3
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call void @llvm.lifetime.end.p0(ptr %sum) #3
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ret void
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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 i8 @idi(i8)
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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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; Function Attrs: nounwind
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declare void @foo(i8)
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attributes #1 = { argmemonly nofree nosync nounwind willreturn }
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attributes #3 = { nounwind }
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