forked from OSchip/llvm-project
272 lines
8.4 KiB
LLVM
272 lines
8.4 KiB
LLVM
target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
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; RUN: opt < %s -passes=alignment-from-assumptions -S | FileCheck %s
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define i32 @foo(i32* nocapture %a) nounwind uwtable readonly {
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entry:
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tail call void @llvm.assume(i1 true) ["align"(i32* %a, i32 32)]
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%0 = load i32, i32* %a, align 4
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ret i32 %0
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; CHECK-LABEL: @foo
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; CHECK: load i32, i32* {{[^,]+}}, align 32
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; CHECK: ret i32
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}
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define i32 @foo2(i32* nocapture %a) nounwind uwtable readonly {
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entry:
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tail call void @llvm.assume(i1 true) ["align"(i32* %a, i32 32, i32 24)]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 -2
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%0 = load i32, i32* %arrayidx, align 4
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ret i32 %0
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; CHECK-LABEL: @foo2
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; CHECK: load i32, i32* {{[^,]+}}, align 16
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; CHECK: ret i32
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}
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define i32 @foo2a(i32* nocapture %a) nounwind uwtable readonly {
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entry:
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tail call void @llvm.assume(i1 true) ["align"(i32* %a, i32 32, i32 28)]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 1
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%0 = load i32, i32* %arrayidx, align 4
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ret i32 %0
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; CHECK-LABEL: @foo2a
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; CHECK: load i32, i32* {{[^,]+}}, align 32
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; CHECK: ret i32
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}
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; TODO: this can be 8-bytes aligned
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define i32 @foo2b(i32* nocapture %a) nounwind uwtable readonly {
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entry:
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tail call void @llvm.assume(i1 true) ["align"(i32* %a, i32 32, i32 28)]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 -1
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%0 = load i32, i32* %arrayidx, align 4
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ret i32 %0
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; CHECK-LABEL: @foo2b
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; CHECK: load i32, i32* {{[^,]+}}, align 4
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; CHECK: ret i32
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}
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define i32 @goo(i32* nocapture %a) nounwind uwtable readonly {
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entry:
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tail call void @llvm.assume(i1 true) ["align"(i32* %a, i32 32, i32 0)]
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%0 = load i32, i32* %a, align 4
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ret i32 %0
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; CHECK-LABEL: @goo
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; CHECK: load i32, i32* {{[^,]+}}, align 32
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; CHECK: ret i32
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}
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define i32 @hoo(i32* nocapture %a) nounwind uwtable readonly {
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entry:
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tail call void @llvm.assume(i1 true) ["align"(i32* %a, i64 32, i32 0)]
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br label %for.body
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%r.06 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %0, %r.06
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%indvars.iv.next = add i64 %indvars.iv, 8
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%1 = trunc i64 %indvars.iv.next to i32
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%cmp = icmp slt i32 %1, 2048
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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%add.lcssa = phi i32 [ %add, %for.body ]
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ret i32 %add.lcssa
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; CHECK-LABEL: @hoo
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; CHECK: load i32, i32* %arrayidx, align 32
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; CHECK: ret i32 %add.lcssa
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}
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; test D66575
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; def hoo2(a, id, num):
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; for i0 in range(id*64, 4096, num*64):
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; for i1 in range(0, 4096, 32):
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; for i2 in range(0, 4096, 32):
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; load(a, i0+i1+i2+32)
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define void @hoo2(i32* nocapture %a, i64 %id, i64 %num) nounwind uwtable readonly {
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entry:
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tail call void @llvm.assume(i1 true) ["align"(i32* %a, i8 32, i64 0)]
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%id.mul = shl nsw i64 %id, 6
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%num.mul = shl nsw i64 %num, 6
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br label %for0.body
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for0.body:
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%i0 = phi i64 [ %id.mul, %entry ], [ %i0.next, %for0.end ]
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br label %for1.body
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for1.body:
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%i1 = phi i64 [ 0, %for0.body ], [ %i1.next, %for1.end ]
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br label %for2.body
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for2.body:
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%i2 = phi i64 [ 0, %for1.body ], [ %i2.next, %for2.body ]
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%t1 = add nuw nsw i64 %i0, %i1
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%t2 = add nuw nsw i64 %t1, %i2
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%t3 = add nuw nsw i64 %t2, 32
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %t3
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%x = load i32, i32* %arrayidx, align 4
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%i2.next = add nuw nsw i64 %i2, 32
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%cmp2 = icmp ult i64 %i2.next, 4096
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br i1 %cmp2, label %for2.body, label %for1.end
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for1.end:
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%i1.next = add nuw nsw i64 %i1, 32
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%cmp1 = icmp ult i64 %i1.next, 4096
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br i1 %cmp1, label %for1.body, label %for0.end
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for0.end:
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%i0.next = add nuw nsw i64 %i0, %num.mul
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%cmp0 = icmp ult i64 %i0.next, 4096
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br i1 %cmp0, label %for0.body, label %return
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return:
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ret void
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; CHECK-LABEL: @hoo2
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; CHECK: load i32, i32* %arrayidx, align 32
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; CHECK: ret void
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}
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define i32 @joo(i32* nocapture %a) nounwind uwtable readonly {
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entry:
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tail call void @llvm.assume(i1 true) ["align"(i32* %a, i8 32, i8 0)]
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br label %for.body
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 4, %entry ], [ %indvars.iv.next, %for.body ]
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%r.06 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %0, %r.06
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%indvars.iv.next = add i64 %indvars.iv, 8
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%1 = trunc i64 %indvars.iv.next to i32
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%cmp = icmp slt i32 %1, 2048
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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%add.lcssa = phi i32 [ %add, %for.body ]
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ret i32 %add.lcssa
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; CHECK-LABEL: @joo
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; CHECK: load i32, i32* %arrayidx, align 16
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; CHECK: ret i32 %add.lcssa
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}
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define i32 @koo(i32* nocapture %a) nounwind uwtable readonly {
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entry:
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br label %for.body
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%r.06 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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tail call void @llvm.assume(i1 true) ["align"(i32* %a, i8 32, i8 0)]
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%0 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %0, %r.06
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%indvars.iv.next = add i64 %indvars.iv, 4
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%1 = trunc i64 %indvars.iv.next to i32
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%cmp = icmp slt i32 %1, 2048
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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%add.lcssa = phi i32 [ %add, %for.body ]
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ret i32 %add.lcssa
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; CHECK-LABEL: @koo
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; CHECK: load i32, i32* %arrayidx, align 16
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; CHECK: ret i32 %add.lcssa
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}
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define i32 @koo2(i32* nocapture %a) nounwind uwtable readonly {
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entry:
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tail call void @llvm.assume(i1 true) ["align"(i32* %a, i128 32, i128 0)]
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br label %for.body
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ -4, %entry ], [ %indvars.iv.next, %for.body ]
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%r.06 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %0, %r.06
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%indvars.iv.next = add i64 %indvars.iv, 4
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%1 = trunc i64 %indvars.iv.next to i32
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%cmp = icmp slt i32 %1, 2048
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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%add.lcssa = phi i32 [ %add, %for.body ]
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ret i32 %add.lcssa
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; CHECK-LABEL: @koo2
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; CHECK: load i32, i32* %arrayidx, align 16
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; CHECK: ret i32 %add.lcssa
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}
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define i32 @moo(i32* nocapture %a) nounwind uwtable {
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entry:
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tail call void @llvm.assume(i1 true) ["align"(i32* %a, i16 32)]
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%0 = bitcast i32* %a to i8*
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tail call void @llvm.memset.p0i8.i64(i8* align 4 %0, i8 0, i64 64, i1 false)
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ret i32 undef
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; CHECK-LABEL: @moo
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; CHECK: @llvm.memset.p0i8.i64(i8* align 32 %0, i8 0, i64 64, i1 false)
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; CHECK: ret i32 undef
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}
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define i32 @moo2(i32* nocapture %a, i32* nocapture %b) nounwind uwtable {
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entry:
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tail call void @llvm.assume(i1 true) ["align"(i32* %b, i32 128)]
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%0 = bitcast i32* %a to i8*
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tail call void @llvm.assume(i1 true) ["align"(i8* %0, i16 32)]
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%1 = bitcast i32* %b to i8*
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %0, i8* align 4 %1, i64 64, i1 false)
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ret i32 undef
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; CHECK-LABEL: @moo2
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; CHECK: @llvm.memcpy.p0i8.p0i8.i64(i8* align 32 %0, i8* align 128 %1, i64 64, i1 false)
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; CHECK: ret i32 undef
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}
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define i32 @moo3(i32* nocapture %a, i32* nocapture %b) nounwind uwtable {
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entry:
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%0 = bitcast i32* %a to i8*
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tail call void @llvm.assume(i1 true) ["align"(i8* %0, i16 32), "align"(i32* %b, i32 128)]
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%1 = bitcast i32* %b to i8*
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %0, i8* align 4 %1, i64 64, i1 false)
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ret i32 undef
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; CHECK-LABEL: @moo3
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; CHECK: @llvm.memcpy.p0i8.p0i8.i64(i8* align 32 %0, i8* align 128 %1, i64 64, i1 false)
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; CHECK: ret i32 undef
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}
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; Variable alignments appear to be legal, don't crash
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define i32 @pr51680(i32* nocapture %a, i32 %align) nounwind uwtable readonly {
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entry:
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tail call void @llvm.assume(i1 true) ["align"(i32* %a, i32 %align)]
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%0 = load i32, i32* %a, align 4
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ret i32 %0
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; CHECK-LABEL: @pr51680
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; CHECK: load i32, i32* {{[^,]+}}, align 4
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; CHECK: ret i32
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}
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declare void @llvm.assume(i1) nounwind
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declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind
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