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