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; RUN: opt < %s -slsr -gvn -dce -S | FileCheck %s
target datalayout = "e-i64:64-v16:16-v32:32-n16:32:64"
; foo(input[0]);
; foo(input[s]);
; foo(input[s * 2]);
; =>
; p0 = &input[0];
; foo(*p);
; p1 = p0 + s;
; foo(*p1);
; p2 = p1 + s;
; foo(*p2);
define void @slsr_gep(i32* %input, i64 %s) {
; CHECK-LABEL: @slsr_gep(
; v0 = input[0];
%p0 = getelementptr inbounds i32, i32* %input, i64 0
%v0 = load i32, i32* %p0
call void @foo(i32 %v0)
; v1 = input[s];
%p1 = getelementptr inbounds i32, i32* %input, i64 %s
; CHECK: %p1 = getelementptr inbounds i32, i32* %input, i64 %s
%v1 = load i32, i32* %p1
call void @foo(i32 %v1)
; v2 = input[s * 2];
%s2 = shl nsw i64 %s, 1
%p2 = getelementptr inbounds i32, i32* %input, i64 %s2
; CHECK: %p2 = getelementptr inbounds i32, i32* %p1, i64 %s
%v2 = load i32, i32* %p2
call void @foo(i32 %v2)
ret void
}
; foo(input[0]);
; foo(input[(long)s]);
; foo(input[(long)(s * 2)]);
; =>
; p0 = &input[0];
; foo(*p);
; p1 = p0 + (long)s;
; foo(*p1);
; p2 = p1 + (long)s;
; foo(*p2);
define void @slsr_gep_sext(i32* %input, i32 %s) {
; CHECK-LABEL: @slsr_gep_sext(
; v0 = input[0];
%p0 = getelementptr inbounds i32, i32* %input, i64 0
%v0 = load i32, i32* %p0
call void @foo(i32 %v0)
; v1 = input[s];
%t = sext i32 %s to i64
%p1 = getelementptr inbounds i32, i32* %input, i64 %t
; CHECK: %p1 = getelementptr inbounds i32, i32* %input, i64 %t
%v1 = load i32, i32* %p1
call void @foo(i32 %v1)
; v2 = input[s * 2];
%s2 = shl nsw i32 %s, 1
%t2 = sext i32 %s2 to i64
%p2 = getelementptr inbounds i32, i32* %input, i64 %t2
; CHECK: %p2 = getelementptr inbounds i32, i32* %p1, i64 %t
%v2 = load i32, i32* %p2
call void @foo(i32 %v2)
ret void
}
; int input[10][5];
; foo(input[s][t]);
; foo(input[s * 2][t]);
; foo(input[s * 3][t]);
; =>
; p0 = &input[s][t];
; foo(*p0);
; p1 = p0 + 5s;
; foo(*p1);
; p2 = p1 + 5s;
; foo(*p2);
define void @slsr_gep_2d([10 x [5 x i32]]* %input, i64 %s, i64 %t) {
; CHECK-LABEL: @slsr_gep_2d(
; v0 = input[s][t];
%p0 = getelementptr inbounds [10 x [5 x i32]], [10 x [5 x i32]]* %input, i64 0, i64 %s, i64 %t
%v0 = load i32, i32* %p0
call void @foo(i32 %v0)
; v1 = input[s * 2][t];
%s2 = shl nsw i64 %s, 1
; CHECK: [[BUMP:%[a-zA-Z0-9]+]] = mul i64 %s, 5
%p1 = getelementptr inbounds [10 x [5 x i32]], [10 x [5 x i32]]* %input, i64 0, i64 %s2, i64 %t
; CHECK: %p1 = getelementptr inbounds i32, i32* %p0, i64 [[BUMP]]
%v1 = load i32, i32* %p1
call void @foo(i32 %v1)
; v3 = input[s * 3][t];
%s3 = mul nsw i64 %s, 3
%p2 = getelementptr inbounds [10 x [5 x i32]], [10 x [5 x i32]]* %input, i64 0, i64 %s3, i64 %t
; CHECK: %p2 = getelementptr inbounds i32, i32* %p1, i64 [[BUMP]]
%v2 = load i32, i32* %p2
call void @foo(i32 %v2)
ret void
}
%struct.S = type <{ i64, i32 }>
; In this case, the bump
; = (char *)&input[s * 2][t].f1 - (char *)&input[s][t].f1
; = 60 * s
; which may not be divisible by typeof(input[s][t].f1) = 8. Therefore, we
; rewrite the candidates using byte offset instead of index offset as in
; @slsr_gep_2d.
define void @slsr_gep_uglygep([10 x [5 x %struct.S]]* %input, i64 %s, i64 %t) {
; CHECK-LABEL: @slsr_gep_uglygep(
; v0 = input[s][t].f1;
%p0 = getelementptr inbounds [10 x [5 x %struct.S]], [10 x [5 x %struct.S]]* %input, i64 0, i64 %s, i64 %t, i32 0
%v0 = load i64, i64* %p0
call void @bar(i64 %v0)
; v1 = input[s * 2][t].f1;
%s2 = shl nsw i64 %s, 1
; CHECK: [[BUMP:%[a-zA-Z0-9]+]] = mul i64 %s, 60
%p1 = getelementptr inbounds [10 x [5 x %struct.S]], [10 x [5 x %struct.S]]* %input, i64 0, i64 %s2, i64 %t, i32 0
; CHECK: getelementptr inbounds i8, i8* %{{[0-9]+}}, i64 [[BUMP]]
%v1 = load i64, i64* %p1
call void @bar(i64 %v1)
; v2 = input[s * 3][t].f1;
%s3 = mul nsw i64 %s, 3
%p2 = getelementptr inbounds [10 x [5 x %struct.S]], [10 x [5 x %struct.S]]* %input, i64 0, i64 %s3, i64 %t, i32 0
; CHECK: getelementptr inbounds i8, i8* %{{[0-9]+}}, i64 [[BUMP]]
%v2 = load i64, i64* %p2
call void @bar(i64 %v2)
ret void
}
define void @slsr_out_of_bounds_gep(i32* %input, i32 %s) {
; CHECK-LABEL: @slsr_out_of_bounds_gep(
; v0 = input[0];
%p0 = getelementptr i32, i32* %input, i64 0
%v0 = load i32, i32* %p0
call void @foo(i32 %v0)
; v1 = input[(long)s];
%t = sext i32 %s to i64
%p1 = getelementptr i32, i32* %input, i64 %t
; CHECK: %p1 = getelementptr i32, i32* %input, i64 %t
%v1 = load i32, i32* %p1
call void @foo(i32 %v1)
; v2 = input[(long)(s * 2)];
%s2 = shl nsw i32 %s, 1
%t2 = sext i32 %s2 to i64
%p2 = getelementptr i32, i32* %input, i64 %t2
; CHECK: %p2 = getelementptr i32, i32* %p1, i64 %t
%v2 = load i32, i32* %p2
call void @foo(i32 %v2)
ret void
}
declare void @foo(i32)
declare void @bar(i64)
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