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144 lines
4.3 KiB
144 lines
4.3 KiB
4 months ago
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; RUN: opt < %s -nary-reassociate -early-cse -S | FileCheck %s
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target datalayout = "e-i64:64-v16:16-v32:32-n16:32:64"
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target triple = "nvptx64-unknown-unknown"
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declare void @foo(float*)
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; foo(&a[i]);
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; foo(&a[i + j]);
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; =>
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; t = &a[i];
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; foo(t);
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; foo(t + j);
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define void @reassociate_gep(float* %a, i64 %i, i64 %j) {
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; CHECK-LABEL: @reassociate_gep(
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%1 = add i64 %i, %j
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%2 = getelementptr float, float* %a, i64 %i
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; CHECK: [[t1:[^ ]+]] = getelementptr float, float* %a, i64 %i
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call void @foo(float* %2)
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; CHECK: call void @foo(float* [[t1]])
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%3 = getelementptr float, float* %a, i64 %1
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; CHECK: [[t2:[^ ]+]] = getelementptr float, float* [[t1]], i64 %j
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call void @foo(float* %3)
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; CHECK: call void @foo(float* [[t2]])
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ret void
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}
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; foo(&a[sext(j)]);
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; foo(&a[sext(i +nsw j)]);
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; foo(&a[sext((i +nsw j) +nsw i)]);
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; =>
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; t1 = &a[sext(j)];
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; foo(t1);
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; t2 = t1 + sext(i);
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; foo(t2);
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; t3 = t2 + sext(i); // sext(i) should be GVN'ed.
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; foo(t3);
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define void @reassociate_gep_nsw(float* %a, i32 %i, i32 %j) {
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; CHECK-LABEL: @reassociate_gep_nsw(
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%idxprom.j = sext i32 %j to i64
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%1 = getelementptr float, float* %a, i64 %idxprom.j
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; CHECK: [[t1:[^ ]+]] = getelementptr float, float* %a, i64 %idxprom.j
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call void @foo(float* %1)
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; CHECK: call void @foo(float* [[t1]])
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%2 = add nsw i32 %i, %j
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%idxprom.2 = sext i32 %2 to i64
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%3 = getelementptr float, float* %a, i64 %idxprom.2
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; CHECK: [[sexti:[^ ]+]] = sext i32 %i to i64
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; CHECK: [[t2:[^ ]+]] = getelementptr float, float* [[t1]], i64 [[sexti]]
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call void @foo(float* %3)
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; CHECK: call void @foo(float* [[t2]])
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%4 = add nsw i32 %2, %i
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%idxprom.4 = sext i32 %4 to i64
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%5 = getelementptr float, float* %a, i64 %idxprom.4
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; CHECK: [[t3:[^ ]+]] = getelementptr float, float* [[t2]], i64 [[sexti]]
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call void @foo(float* %5)
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; CHECK: call void @foo(float* [[t3]])
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ret void
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}
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; assume(j >= 0);
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; foo(&a[zext(j)]);
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; assume(i + j >= 0);
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; foo(&a[zext(i + j)]);
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; =>
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; t1 = &a[zext(j)];
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; foo(t1);
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; t2 = t1 + sext(i);
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; foo(t2);
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define void @reassociate_gep_assume(float* %a, i32 %i, i32 %j) {
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; CHECK-LABEL: @reassociate_gep_assume(
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; assume(j >= 0)
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%cmp = icmp sgt i32 %j, -1
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call void @llvm.assume(i1 %cmp)
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%1 = add i32 %i, %j
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%cmp2 = icmp sgt i32 %1, -1
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call void @llvm.assume(i1 %cmp2)
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%idxprom.j = zext i32 %j to i64
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%2 = getelementptr float, float* %a, i64 %idxprom.j
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; CHECK: [[t1:[^ ]+]] = getelementptr float, float* %a, i64 %idxprom.j
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call void @foo(float* %2)
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; CHECK: call void @foo(float* [[t1]])
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%idxprom.1 = zext i32 %1 to i64
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%3 = getelementptr float, float* %a, i64 %idxprom.1
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; CHECK: [[sexti:[^ ]+]] = sext i32 %i to i64
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; CHECK: [[t2:[^ ]+]] = getelementptr float, float* [[t1]], i64 [[sexti]]
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call void @foo(float* %3)
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; CHECK: call void @foo(float* [[t2]])
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ret void
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}
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; Do not split the second GEP because sext(i + j) != sext(i) + sext(j).
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define void @reassociate_gep_no_nsw(float* %a, i32 %i, i32 %j) {
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; CHECK-LABEL: @reassociate_gep_no_nsw(
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%1 = add i32 %i, %j
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%2 = getelementptr float, float* %a, i32 %j
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; CHECK: getelementptr float, float* %a, i32 %j
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call void @foo(float* %2)
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%3 = getelementptr float, float* %a, i32 %1
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; CHECK: getelementptr float, float* %a, i32 %1
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call void @foo(float* %3)
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ret void
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}
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define void @reassociate_gep_128(float* %a, i128 %i, i128 %j) {
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; CHECK-LABEL: @reassociate_gep_128(
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%1 = add i128 %i, %j
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%2 = getelementptr float, float* %a, i128 %i
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; CHECK: [[t1:[^ ]+]] = getelementptr float, float* %a, i128 %i
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call void @foo(float* %2)
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; CHECK: call void @foo(float* [[t1]])
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%3 = getelementptr float, float* %a, i128 %1
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; CHECK: [[truncj:[^ ]+]] = trunc i128 %j to i64
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; CHECK: [[t2:[^ ]+]] = getelementptr float, float* [[t1]], i64 [[truncj]]
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call void @foo(float* %3)
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; CHECK: call void @foo(float* [[t2]])
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ret void
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}
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%struct.complex = type { float, float }
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declare void @bar(%struct.complex*)
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define void @different_types(%struct.complex* %input, i64 %i) {
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; CHECK-LABEL: @different_types(
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%t1 = getelementptr %struct.complex, %struct.complex* %input, i64 %i
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call void @bar(%struct.complex* %t1)
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%j = add i64 %i, 5
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%t2 = getelementptr %struct.complex, %struct.complex* %input, i64 %j, i32 0
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; CHECK: [[cast:[^ ]+]] = bitcast %struct.complex* %t1 to float*
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; CHECK-NEXT: %t2 = getelementptr float, float* [[cast]], i64 10
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; CHECK-NEXT: call void @foo(float* %t2)
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call void @foo(float* %t2)
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ret void
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}
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declare void @llvm.assume(i1)
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