04b944e230
The only interesting test change is in @PR31262, where the following fold is now performed, while it previously was not: https://alive2.llvm.org/ce/z/a5Qmr6 llvm/test/Transforms/InstSimplify/ConstProp/gep.ll has not been updated, because there is a tradeoff between folding and inrange preservation there that we may want to discuss. Updates have been performed using: https://gist.github.com/nikic/98357b71fd67756b0f064c9517b62a34
74 lines
2.6 KiB
LLVM
74 lines
2.6 KiB
LLVM
; NOTE: This is a timeout test for some O(something silly) constant folding behaviour. It may not be the best test. Providing it finishes, it passes.
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; RUN: opt < %s -O3 -S | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "armv8-none-eabi"
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%struct.ST = type { ptr }
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@global = internal global [121 x i8] zeroinitializer, align 1
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define void @func() #0 {
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;CHECK-LABEL: func
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entry:
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%s = alloca ptr, align 4
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%j = alloca i32, align 4
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store ptr @global, ptr %s, align 4
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store i32 0, ptr %j, align 4
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%0 = load i32, ptr %j, align 4
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%cmp = icmp slt i32 %0, 30
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br i1 %cmp, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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%1 = load ptr, ptr %s, align 4
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%2 = bitcast ptr %1 to ptr
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%add.ptr = getelementptr inbounds i8, ptr %2, i32 4
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%3 = ptrtoint ptr %add.ptr to i32
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%4 = load ptr, ptr %s, align 4
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%5 = bitcast ptr %4 to ptr
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%add.ptr1 = getelementptr inbounds i8, ptr %5, i32 4
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%6 = ptrtoint ptr %add.ptr1 to i32
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%rem = urem i32 %6, 2
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%cmp2 = icmp eq i32 %rem, 0
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br i1 %cmp2, 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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%7 = load ptr, ptr %s, align 4
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%8 = bitcast ptr %7 to ptr
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%add.ptr3 = getelementptr inbounds i8, ptr %8, i32 4
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%9 = ptrtoint ptr %add.ptr3 to i32
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%rem4 = urem i32 %9, 2
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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 [ 0, %cond.true ], [ %rem4, %cond.false ]
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%add = add i32 %3, %cond
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%10 = inttoptr i32 %add to ptr
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%11 = load ptr, ptr %s, align 4
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%next = getelementptr inbounds %struct.ST, ptr %11, i32 0, i32 0
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store ptr %10, ptr %next, align 4
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%12 = load ptr, ptr %s, align 4
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%next5 = getelementptr inbounds %struct.ST, ptr %12, i32 0, i32 0
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%13 = load ptr, ptr %next5, align 4
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store ptr %13, ptr %s, align 4
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br label %for.inc
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for.inc: ; preds = %cond.end
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%14 = load i32, ptr %j, align 4
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%inc = add nsw i32 %14, 1
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store i32 %inc, ptr %j, align 4
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br label %for.cond
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for.end: ; preds = %for.cond
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%15 = load ptr, ptr %s, align 4
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%next6 = getelementptr inbounds %struct.ST, ptr %15, i32 0, i32 0
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store ptr null, ptr %next6, align 4
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ret void
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}
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